Category Archives: Mortars

“I would propose … the train be intrusted to Colonel Abbot”: Organizing a Siege Train for the 1864 Campaign

Earlier I posted about the reorganization, or if you prefer, consolidation, of the field artillery in the weeks before the start of the Overland Campaign.  Another organizational action, no less critical to the ultimate objective of the campaign, for the artillery supporting the Army of the Potomac was the re-creation of the siege train.  If the upcoming campaign were completely successful, and destroyed the Army of Northern Virginia outside of Richmond, then there would be little need for a siege train or any artillery.  But the most likely scenario (and what did come to pass) involved a siege of Richmond in some form.  Acting on prompts from his superiors, Brigadier-General Henry Hunt put forward his recommendations on April 16, 1864:

Artillery Headquarters, Army of the Potomac,
April 16, 1864.
Major-General Humphreys,
Chief of Staff:
General: I have respectfully to submit the following proposition for the organization of a siege train, should one be required for service with this army near Richmond:

The train should be prepared in Washington, and as a minimum composed of forty 4 ½-inch siege guns, six spare carriages: ten 10-inch mortars, two spare carriages; twenty 8-inch mortars, four spare carriages; twenty Coehorn mortars.

With the proper implements and equipments, tool wagons, sling carts, battery wagons and forges, mortar wagons, &c., the eight 4½-inch siege guns of Abbot’s regiment (First Connecticut Heavy Artillery), lately sent to Washington, to constitute a part of the train. If the material can be brought by water or rail to within a reasonable distance of the point at which the train is to be used, the horse teams of the two siege batteries and those of the Artillery Reserve would be available for transporting the guns, and such additional mule teams as are required to bring them up can, it is supposed, be furnished from the quartermaster’s trains. The ammunition trains of the Artillery Reserve and artillery brigades attached to corps can be employed for the transport of the ammunition.

There should be provided for each siege gun 1,000 rounds of ammunition: for each siege mortar 600 shells: for each Coehorn mortar 200. Of this ammunition 200 rounds per piece should be brought up before opening fire; the remainder to be near enough to enable the supply to be kept up. At least 500 sand-bags should be supplied for each gun and mortar of the train, with an equal number in reserve.

I would propose that the organization of the train be intrusted to Colonel Abbot, First Connecticut Artillery, whose regiment served with the siege train at the siege of Yorktown. That the work may proceed with the utmost rapidity, another regiment of foot artillery (Kellogg’s, Warner’s, or Piper’s) might be added to Colonel Abbot’s command. Colonel Kellogg served with credit in the First Connecticut Artillery at Yorktown and is familiar with the duties. The two regiments of foot artillery in the reserve will be available as reliefs, guards for working parties, fabrication of gabions and fascines, filling sand-bags, &c.

The instruction of the regiments with the train in the mechanical maneuvers, laying of platforms, &c., should commence at once. A thorough knowledge of these duties will save much time when every hour is valuable. The material and working directions for constructing magazines, one for every four guns, should also be prepared in advance, that workmen drawn from the foot artillery regiments with the army may assist the engineers or construct them themselves.

It is understood that there are rifled 32-pounders, 4-inch caliber, in the works at Richmond. Should it be considered necessary to oppose to them guns of corresponding power (100-pounders) the ordnance officer should be instructed to prepare them and their material. This would be a timely precaution.

In case it should be thought necessary to move the train by water up the Pamunkey to the neighborhood of Hanover Court-House, instructions should be given to load the material on barges, double-decked ones if possible, such as are used on the Hudson River for transportation of flour, and do not draw more than 5 feet. This depth I understand is found as far up as the bridge at Widow Lumpkin’s, near Crump Creek, and within 5 miles by land of the railroad. The depth of water and the nature of the road from the bridge to the railway should be ascertained positively before procuring the barges. A decked scow or two and 100 or 200 feet of trestle bridging, similar to that prepared by Major Duane for the pontoon train, but of stronger dimensions, should be provided to enable landings to be effected at any point.

Henry J. Hunt,
Brigadier-General, Chief of Artillery.

Hunt knew exactly the make of weapons he wanted in the siege train.  Notice he still preferred the 4.5-inch rifles over the Parrotts of similar caliber (30-pdr).  And for someone who had worked primarily with field artillery over the last three years, Hunt knew the value of high angle mortar fire in siege operations.  Lower in the proposal, he turns to the heavy 100-pdr Parrotts, but only as a counter to similar caliber Confederate weapons.  Such leads me to believe Hunt saw the artillery’s primary role during any such siege to be firing in support of the engineers advancing parallels, and not demolishing enemy works.

Hunt called for 500 sandbags per gun, with another 500 in reserve.  Given the number of sandbags used the previous summer on Morris Island, I would say his estimates were low.

Notice also, in the last paragraph, how Hunt called out specific locations from which to base the siege trains and how they might be moved forward.  The lessons from the 1862 Richmond Campaign hold up while planning for 1864.

And Hunt knew exactly who he wanted manning the guns and leading those gunners.  Two batteries of the 1st Connecticut Heavy Artillery, armed with 4.5-inch rifles, had performed well as part of the Army’s artillery reserve.  And the 1st  Connecticut earlier served with the Army of the Potomac in the 1862 campaign against Richmond.  The man to lead the siege trains was Colonel Henry L. Abbot.  Hunt knew exactly what he was getting there.  Abbot was one of the best artillerists of the war, though you’ve probably never heard of him because his specialty was heavy artillery.  For those unfamiliar with Abbot, I hope to introduce him and his work over the last year of the sesquicentennial … that is if Brett does not beat me to it!

(Citation from OR, Series I, Volume 33, Serial 60, pages 880-1.)

Mortars at night against Fort Sumter: Another “minor” bombardment

Although not at the rate seen the previous fall, shot and shell still fell around Charleston as the spring season arrived.  Federals on Morris Island continued what is best described as “harassing fire” on Fort Sumter.  Usually no more than a handful of mortar or Parrott rifle rounds.  But on the afternoon of April 3, the pace of fire picked up.  Reports from Lieutenant-Colonel Stephen Elliott, the fort’s commander, reflected this increase.  His report on the morning of April 3 noted the previous night’s activities:

Fort Sumter, April 3, 1864.
Sir: Eight shots were fired while the obstructions were being taken in before daylight this morning; 6 struck, but did no damage, No further change.

Later, after dark, he sent another report:

Fort Sumter, April 3, 1864.
Enemy commenced firing slowly from two mortars at 5 o’clock this afternoon.

And the following morning, he offered this summary:

Fort Sumter, April 4, 1864.
Sir: I have the honor to report the firing continued up to 5 a.m. There were 66 mortar and 1 Parrott shell fired at the fort, of which 57 struck. One negro killed; no injury done to the work.

A “minor” bombardment for Charleston.  Yet anywhere else, that many heavy projectiles would have solicited more than a few casual lines in a report.  Elliot’s carried a humdrum tone.  On the other side of the channel, the Federals might have contested his round count.  The 3rd Rhode Island Heavy Artillery reported firing 80 shots that day from two 10-inch mortars:

April3_29_64_mortarFire

The table includes figures for fires on April 29, which I’ll turn to at the appropriate time.  The 3rd’s regimental history described the weather at the time as calm.  The two mortars firing on April 3 were in Battery Seymour, just outside Fort Chatfield.

MorrisIslandBatteries

Given the Federal mortarmen knew better what they fired, I go with 80 shells fired, propelled by 490 pounds of powder, to a range of 1,800 yards.  Seventy five of those hit Fort Sumter with five falling short.  Yet, for all that effort, no serious damage to the fort and only one casualty – one of the laborers at that.

(Citations from OR, Series I, Volume 35, Part I, Serial 65, pages 199-200; Frederic Denison, Shot and Shell: The Third Rhode Island Heavy Artillery Regiment in the Rebellion, 1861-1865, Providence, R.I.: Third Rhode Island Artillery Veterans Association, 1879, page 239.)

150 Years Ago: An inspection of the batteries on Sullivan’s Island

One aspect of the operations of Charleston that I like to present is the evolution of fortifications around the harbor (Federal and Confederate).  In my opinion, one should study such to appreciate the tactical aspects. Many authors will write on the subject as if a “battery” or “fort” was static and unchanged through the war, and thus representing a generic “unit” of force.  However, I would offer the level of detail offered in reports and correspondence during the war indicate the participants saw no small importance in the evolution of those defenses.  In other words, if the participants in 1864 thought it important to mention the different caliber of weapons, then 150 years later we should lend that aspect some manner of interpretation.

In the case of Sullivan’s Island, one can easily trace the evolution of the works from the very first days of the war, through improvements prior to the Ironclad Attack on Fort Sumter, changes after the fall of Morris Island, and all the way up to the fall of Charleston in 1864.  A report posted by Major George Upshur Mayo on March 29, 1864 provides one of several “snapshots” describing the works on Sullivan’s Island on that time line.  The entire report, including endorsements, is close to 3,000 words with three pages of tables, including a count of all munitions (the report appears in the ORs, Series I, Volume 35, Part II, Serial 66, pages 383-6).  For brevity, allow me to present portions of the main report with additional annotations where needed.  And for reference, these are the works in review:

Sullivans_Island_Batteries

Starting from the western-most battery:

Battery Bee, upon the western extremity, is not yet quite completed, though a number of laborers are engaged upon it. Its armament is in an effective condition, the guns all working well and protected by merlons. The magazines are dry and kept with neatness. The ammunition in them, as far as could be judged without examining each cartridge, is in good order; the implements new. There are three chambers which have no cannon, which, I presume, will be furnished when necessity or opportunity requires.

Mayo indicated Battery Bee included one 11-inch Dahlgren (salvaged from the USS Keokuk), four 10-inch columbiads, one 10-inch rifled columbiad, and one 8-inch columbiad. In the magazines were 241 11-inch shot, 97 11-inch shell, 671 10-inch shot, 435 10-inch shell, 50 10-inch grapeshot, 25 10-inch canister, 45 10-inch (rifled) bolts, 6 10-inch rifled shells, 338 8-inch shot, 134 8-inch shells, 30 8-inch canister, 124 11-inch cartridges, 626 10-inch cartridges, 180 8-inch cartridges, 2,496 pounds of common powder, 1,587 friction tubes, and 985 paper fuses.  Interesting, though, Mayo rated Battery Bee as incomplete even at this late date with open gun positions.

On to the next battery in the line:

Battery Marion, connected with Battery Bee, is neatly policed. The platform for the 7-inch Brooke gun has settled from its true position; the parapets in one or two places have a disposition to slide on account of the shifting character of the sand. Dampness begins to ooze through one place in the passage, not as yet sufficient to affect the ammunition, which is in good order.

Colonel [William] Butler complains of a defect in the powder sent from the naval ordnance bureau with or for the Brooke gun, saying experience has proven it to be defective in strength. To the eye it appears good; analysis can only disclose the reported defect. The same officer requests that efforts be made to procure for the guns in his command a small quantity of bar steel to repair the eccentrics of the columbiad carriages, which repairs, when necessary, can be made at the island. The battery is connected with Fort Moultrie by a sally-port.

Mayo tallied Battery Marion’s armament as three 10-inch columbiads, one 8-inch columbiad, and five 10-inch seacoast mortars; but he didn’t count the triple-banded 7-inch Brooke which was not mounted at that time.  In the magazines were 318 10-inch shot, 261 10-inch shells, 23 10-inch canister, 256 10-inch mortar shells, 125 7-inch rifle shells, 522 7-inch bolts, 16 7-inch hollow shot, 252 10-inch cartridges, 201 8-inch cartridges, 207 7-inch cartridges, 8,800 pounds of powder, 1,900 friction primers, and 600 paper fuses.

Mayo gave only a brief report on Fort Moultrie:

Fort Moultrie, next in order upon the island, has now no quarters inside, which gives a good parade within its walls. It is well protected by a system of traverses and the guns in effective condition. The magazine is in good order and neatly kept. In the rear of the fort are a number of broken canister, which might be removed for renewal to Charleston. The ammunition in good order.

The fort’s armament at that time consisted of four 10-inch columbiads, two 8-inch rifled columbiads, one 32-pdr banded and rifled, two 24-pdr smoothbore guns, and one 10-inch seacoast mortar.  Munitions in the fort included 660 10-inch shot, 269 10-inch shells, 36 10-inch canister, 33 10-inch spherical case, 90 8-inch shot, 53 8-inch shells, 190 8-inch rifled bolts, 274 32-pdr shells, 120 32-pdr rifled bolts, 553 24-pdr shot, 83 24-pdr grapeshot, 89 24-pdr canister, 450 10-inch cartridges, 255 8-inch cartridges, 485 32-pdr cartridges, 168 24-pdr cartridges, 18,275 pounds of common powder, 130 pounds of rifle powder, and 4,510 friction tubes.

Continuing, Mayo reached Battery Rutledge:

Battery Rutledge in good order, with its ammunition dry and well cared for. The batteries from Bee to this one constitute one continuous parapet, well protected with traverses and spacious, well arranged bomb-proofs, and in some instances with amputating rooms for the medical bureau; these of course were not visited.

Battery Rutledge contained three 10-inch columbiads, one 10-inch columbiad rifle, and three 10-inch seacoast mortars.  The magazines contained 396 10-inch shot, 125 10-inch shell, 7 10-inch grapeshot, 26 10-inch canister, 11 10-inch caseshot, 58 10-inch rifled bolts, 22 10-inch rifled shells, 40 10-inch mortar shells, 126 6-pdr canister (fixed), 29 6-pdr (fixed) shot, 236 10-inch cartridges, 4,000 pounds of common powder, and 2,300 pounds of damaged powder.

Mayo did not include a narrative assessment of Fort Beauregard, but listed the armament as one 10-inch columbiad, one 8-inch rifled and banded columbiad, one 8-inch smoothbore columbiad, two 32-pdr banded and rifled guns, one 32-pdr smoothbore gun, two 24-pdr smoothbore guns, and three 8-inch seacoast howitzers.  In Fort Beauregard’s magazine were 106 10-inch shot, 3 10-inch canister, 416 8-inch shot, 111 8-inch shell, 79 8-inch grapeshot, 113 8-inch canister, 169 8-inch shell, 69 8-inch rifled bolts, 101 32-pdr shot, 12 32-pdr shells, 80 32-pdr grapeshot, 69 32-pdr canister, 166 32-pdr rifled bolts, 7 32-pdr conical rifled shot, 156 32-pdr rifled shells, 229 24-pdr shot, 156 24-pdr grapeshot, 2 24-pdr conical smoothbore shell, 130 24-pdr canister, 749 unfixed cartridges of various sizes,  1,800 pounds of common powder, 1,150 pounds of “Rodman” powder (presumably “Mammoth” powder), 200 pounds of damaged powder, and 1,529 friction tubes.

Mayo turned next to the four numbered, and unnamed, batteries between Forts Beauregard and Marshall.

Nos. 1, 2, 3, and 4, two-gun batteries extending along the south beach at an average distance of about 500 yards apart, covering the space between Forts Beauregard and Marshall and intended seemingly as a protection against boat assaults, are small open works with no traverses. There being no magazine in this cordon of works, the ammunition is kept in chests, exposed to the weather. Some of the chests need repairs and tarpaulins as a protection.

Mayo suggested improvements to the parapet of No. 1; mentioned a carriage in No. 3 that required repair; and damages to the parapet of No. 4. Mayo also suggested these works needed iron traverse circles to replace wood circles then in place.  Colonel Ambrosio Gonzales overruled, saying the 24-pdr guns should be mounted on siege carriages to allow redeployment where needed on the island.  Mayo noted the “disparity” in the ammunition for each of these batteries:

  • No. 1:  Two 32-pdr smoothbore guns, 104 32-pdr shot, 15 32-pdr shells, 77 32-pdr grapeshot, 78 32-pdr canister, 93 32-pdr cartridges, and 176 friction tubes.
  • No. 2: two 24-pdr smoothbores, 84 24-pdr shot, 100 24-pdr grape, 32 24-pdr canister, 69 24-pdr cartridges, 140 friction tubes, and 5 signal rockets.
  • No. 3: Two 32-pdr smoothbores, 34 32-pdr shot, 9 32-pdr shells, 48 32-pdr grape, 50 32-pdr canister, 46 32-pdr cartridges, and 49 friction tubes.
  • No. 4: Two 24-pdr smootbores, 88 24-pdr shot, 14 24-pdr shells, 111 24-pdr grape, 99 24-pdr canister, 29 24-pdr cartridges, and 41 friction tubes.

The last work on the line inspected by Mayo was Fort (or Battery) Marshall, at Breach Inlet:

Battery Marshall, at Beach Inlet, is as yet in an incomplete condition, though the guns are all in working order. A large bomb-proof, in addition to those already complete, has been commenced, upon which a force is now at work. One of the 12-pounders has wheels of different sizes, and in another the cheeks of the carriage are not upon a level. These two defects in these two carriages should be remedied. The magazines are in good order, and dry, as well as the ammunition, but roaches, by which they are infested, cut the cartridge-bags. It would therefore be as well to keep the powder in the boxes and barrels until a necessity arises for use, so that the bags may be preserved. I noticed the passage-way to one of the magazines much encumbered with shell. A room constructed for such projectiles is decidedly to be preferred.

Fort Marshall, at this time, included one 8-inch columbiad, one 8-inch shell gun, one 7-inch Brooke rifle, one 32-pdr rifle, two 12-pdr rifled guns, two 12-pdr smoothbores, one 4-inch Blakely on naval carriage, and three 8-inch seacoast howitzers.  The magazines, improper as they were, contained 95 8-inch shot, 225 8-inch shell, 71 8-inch grapeshot, 90 8-inch canister, 156 7-inch conical rifled bolts, 19 32-pdr shells, 12 32-pdr grapeshot, 16 32-pdr canister, 32 32-pdr rifled shot, 100 32-pdr rifled shells, 292 12-pdr shot, 124 12-pdr grapeshot, 124 12-pdr canister, 25 12-pdr conical rifled shot, 62 12-pdr conical rifled shells, 32 4-inch Blakely shells, 28 4-inch Blakely grapeshot, 21 4-inch Blakely canister,  866 cartridges of various sizes, 2,800 pounds of common powder, 500 friction tubes, 35 paper fuses, 190 Girardey fuses, and 92 McAvoy igniters.

Mayo went on to discuss Batteries Gary, Kinloch and Palmetto on the mainland. But to serve brevity in a post already beyond my preferred word count, I will save those for later.

Mayo expressed concerns about unmounted and unassigned guns on the island.  “A 32-pounder banded rifle not mounted is laying upon the beach,” he noted.  He also mentioned several 6-pdr field pieces not under any direct control of the battery commanders.  In general, Mayo felt the guns needed “lacquer and paint” to improve appearances and protect against the elements.  Lastly, he noted the presence of bedding in the magazines, but left that matter to the discretion of local commanders.

I plan, as part of my documentation of each individual work, to examine these batteries in detail.  So please check back for follow up posts in regard to specific arrangements in each fortification.