The fort consisted of four main faces, with additional angles built into the north and east faces. It maintained a perimeter of {{convert|768|yard|m}} with emplacements for 34 guns. Interior structures included two [[Bomb shelter|bomb-proof]]s, [[Magazine (artillery)|ammunition magazines]], and other supporting structures.<ref name=VAnom/><ref>[https://books.google.com/books?id=3qRIuDHJoTEC Cooling, pp. 128–136] {{webarchive|url=https://web.archive.org/web/20160424233500/https://books.google.com/books?id=3qRIuDHJoTEC |date=2016-04-24 }}.</ref>
The fort consisted of four main faces, with additional angles built into the north and east faces. It maintained a perimeter of {{convert|768|yard|m}} with emplacements for 34 guns. Interior structures included two [[Bomb shelter|bomb-proof]]s, [[Magazine (artillery)|ammunition magazines]], and other supporting structures.<ref name=VAnom/><ref>[https://books.google.com/books?id=3qRIuDHJoTEC Cooling, pp. 128–136] {{webarchive|url=https://web.archive.org/web/20160424233500/https://books.google.com/books?id=3qRIuDHJoTEC |date=2016-04-24 }}.</ref>
On August 28, 1862, Brig.General J.G. Barnard delivered a report to General McClellan stating one Company (Co.D) of the 4th New York Heavy Artillery Regiment was manning the guns at Fort Ethan Allen while other companies and platoons of the Regiment were manning the guns at neighboring forts protecting Washington DC and the surrounding area . From August 1862 until March 1864, Companies of the 4NYHA Regiment were the primary occupant of Ft Ethan Allen while continuing to improve fortifications and rebutments, building barracks to replace tents and make room for the other 4NYHA companies, and build other amenities during their time at the Fort. The pre-existing wiki post infers the Fort was finished during one year, which is not so. By end of 1861 it was a functional but primative fort. It is documented to have been under continuous development into at least March 1864, at which point the 4NYHA was ordered to leave its big guns behind and fight as infantry with Gen. Meade’s forces during the Wilderness Campaign and beyond. (see [[Heavy Guns and Light: A History of the 4th New York Heavy Artillery by Hyland C. Kirk , Pub Dillingham, 1890]]) This book is a testament to the words and experiences of the men of the Regiment who served, were wounded or died while manning the Fort’s guns and in the battles they later encountered as infantry from March 1864 to the war’s end. In this book are detailed drawings and many photographs or illustrations of the Fort and its weapons inventory.
On August 28, 1862, Brig.General J.G. Barnard delivered a report to General McClellan stating one Company (Co.D) of the 4th New York Heavy Artillery Regiment was manning the guns at Fort Ethan Allen while other companies and platoons of the Regiment were manning the guns at neighboring forts protecting Washington DC and the surrounding area . From August 1862 until March 1864, Companies of the 4NYHA Regiment were the primary occupant of Ft Ethan Allen while continuing to improve fortifications and rebutments, building barracks to replace tents and make room for the other 4NYHA companies, and build other amenities during their time at the Fort. The pre-existing wiki post infers the Fort was finished during one year, which is not so. By end of 1861 it was a functional but primative fort. It is documented to have been under continuous development into at least March 1864, at which point the 4NYHA was ordered to leave its big guns behind and fight as infantry with Gen. Meade’s forces during the Wilderness Campaign and beyond. (see [[Heavy Guns and Light: A History of the 4th New York Heavy Artillery by Hyland C. Kirk , Pub Dillingham, 1890]]) This book is a testament to the words and experiences of the men of the Regiment who served, were wounded or died while manning the Fort’s guns and in the battles they later encountered as infantry from March 1864 to the war’s end. In this book are detailed drawings and many photographs or illustrations of the Fort and its weapons .
A May 7, 1864, report from the Union Army’s Inspector of Artillery (see [[Field artillery in the American Civil War#Union artillery|Union Army artillery organization]]) noted the following:<blockquote>”Fort Ethan Allen, Col. A. A. Gibson commanding.”–Garrison, nine companies Second Pennsylvania Heavy Artillery–1 colonel, 29 commissioned officers, 1,346 men, and 1 ordnance-sergeant. Armament, nine [[Field artillery in the American Civil War#Weapons|6-pounder field guns]], three [[Field artillery in the American Civil War#Weapons|10-pounder Parrott]]s, three [[Field artillery in the American Civil War#Howitzers|32-pounder bronze howitzers]], four [[Siege artillery in the American Civil War#James rifles|24-pounder siege guns]], two 8-inch sea-coast [[howitzer]]s, eleven [[Siege artillery in the American Civil War#4.2-inch (30-pounder) Parrott rifle|30-pounder Parrott]]s, six 24-pounder [[Cohorn|Coehorn mortar]]s, four [[Siege artillery in the American Civil War#Mortars|10-inch siege mortars]]. Magazines, four; dry and serviceable. Ammunition, full supply and in good order. Implements, complete and serviceable. Drill in artillery, ordinary; needs improving. Drill in infantry, very indifferent; needs much improving. Discipline, indifferent. Garrison larger than necessary. Cavalry garrison, one company (E) Thirteenth New York Cavalry–2 commissioned officers, 78 enlisted men, 53 equipped, 52 horses.<ref>{{cite book|last=Howe|first=A.P.|author-link=Albion P. Howe|section=Report on the inspection of the defenses of Washington, made by the order of the Secretary of War: Fort Ethan Allen, Col. A. A. Gibson commanding.|date=1864-05-17|page=891|editor=Scott, Robert N.|url=https://babel.hathitrust.org/cgi/pt?id=mdp.49015002000736;view=1up;seq=891|title=The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies. Published under the direction of the Secretary of War (1880–1891)| series= 1 (Military Operations)| volume= 36| location=Washington, DC|publisher=[[United States Government Publishing Office|United States Government Printing Office]] |lccn=03003452|oclc=224137463|via=[[HathiTrust]] Digital Library|accessdate=2018-03-15}} (See: [[Official Records of the War of the Rebellion]])</ref></blockquote>
A May 7, 1864, report from the Union Army’s Inspector of Artillery (see [[Field artillery in the American Civil War#Union artillery|Union Army artillery organization]]) noted the following:<blockquote>”Fort Ethan Allen, Col. A. A. Gibson commanding.”–Garrison, nine companies Second Pennsylvania Heavy Artillery–1 colonel, 29 commissioned officers, 1,346 men, and 1 ordnance-sergeant. Armament, nine [[Field artillery in the American Civil War#Weapons|6-pounder field guns]], three [[Field artillery in the American Civil War#Weapons|10-pounder Parrott]]s, three [[Field artillery in the American Civil War#Howitzers|32-pounder bronze howitzers]], four [[Siege artillery in the American Civil War#James rifles|24-pounder siege guns]], two 8-inch sea-coast [[howitzer]]s, eleven [[Siege artillery in the American Civil War#4.2-inch (30-pounder) Parrott rifle|30-pounder Parrott]]s, six 24-pounder [[Cohorn|Coehorn mortar]]s, four [[Siege artillery in the American Civil War#Mortars|10-inch siege mortars]]. Magazines, four; dry and serviceable. Ammunition, full supply and in good order. Implements, complete and serviceable. Drill in artillery, ordinary; needs improving. Drill in infantry, very indifferent; needs much improving. Discipline, indifferent. Garrison larger than necessary. Cavalry garrison, one company (E) Thirteenth New York Cavalry–2 commissioned officers, 78 enlisted men, 53 equipped, 52 horses.<ref>{{cite book|last=Howe|first=A.P.|author-link=Albion P. Howe|section=Report on the inspection of the defenses of Washington, made by the order of the Secretary of War: Fort Ethan Allen, Col. A. A. Gibson commanding.|date=1864-05-17|page=891|editor=Scott, Robert N.|url=https://babel.hathitrust.org/cgi/pt?id=mdp.49015002000736;view=1up;seq=891|title=The War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies. Published under the direction of the Secretary of War (1880–1891)| series= 1 (Military Operations)| volume= 36| location=Washington, DC|publisher=[[United States Government Publishing Office|United States Government Printing Office]] |lccn=03003452|oclc=224137463|via=[[HathiTrust]] Digital Library|accessdate=2018-03-15}} (See: [[Official Records of the War of the Rebellion]])</ref></blockquote>
