B, D.C. Field Artillery, 1st Squadron, D.C. Cavalry, and detachment from Company A, Virginia Signal Corps) 111th Field Artillery Regiment (75 mm) (former 1st Virginia Field Artillery, Headquarters Company and Companies I and M, 4th Virginia Infantry, and detachment from Company A, Virginia Signal Corps) 112th Field Artillery Regiment (155 mm) (former 1st New Jersey Field Artillery less Battery F, Troops B and D, 1st New Jersey Cavalry, and detachment from Company A, Virginia Signal Corps) 104th Trench Mortar Battery (former Battery F, New Jersey Field Artillery) 110th Machine Gun Battalion (former Machine Gun Company, 5th Maryland Infantry, Machine Gun Company, 4th New Jersey Infantry, and Machine Gun Company, 1st Virginia Infantry) 104th Engineer Regiment (former 1st Battalion. New Jersey Engineers, Company K, 1st New Jersey Infantry, Company G, 2nd New Jersey Infantry, Companies I and L, 3rd New Jersey Infantry, Co. L, 4th New Jersey Infantry, and Co. F, 5th New Jersey Infantry) 104th Field Signal Battalion (former Companies A and C, New Jersey Signal Corps, and Company B, D.C. Signal Corps) Headquarters Troop, 29th Division (detachment from 1st Squadron, New Jersey Cavalry) 104th Train Headquarters and Military Police (former Troops A and C, 1st Squadron New Jersey Cavalry, and Troop A, Maryland Cavalry) 104th Ammunition Train (former 1st Squadron, Virginia Cavalry, and individual transfers) 104th Supply Train (individual transfers) 104th Engineer Train (individual transfers) 104th Sanitary Train 113th, 114th, 115th, and 116th Ambulance Companies and Field Hospitals (former 1st Maryland Ambulance Company, 1st Virginia Ambulance Company, 1st New Jersey Field Hospital, 1st Maryland Field Hospital, and 1st Virginia Field Hospital) Interwar period The 29th was reconstituted in the National Guard in 1921, assigned to the III Corps, and allotted to the states of Maryland and Virginia, and the District of Columbia. New Jersey units that had been part of the 29th Division in World War I were assigned to the new 44th Division, that encompassed troops from New Jersey and New York. When 155 mm howitzers were returned to infantry divisions beginning in 1929, a formerly non-divisional unit from Pennsylvania was assigned to the division. The division trained as a unit during the 1935 First Army maneuvers at Fort Indiantown Gap, Pennsylvania, and during the 1939 First Army maneuvers at Manassas, Virginia. Order of battle, 1939 Headquarters, 29th Division (Washington, D.C.) Headquarters, Special Troops, 29th Division (Washington, D.C.) Headquarters Company, 29th Division (Washington, D.C.) 29th Military Police Company