W1st Cavalry Regiment (United States)
W2nd Cavalry Regiment (United States)
W2nd Massachusetts Cavalry Regiment
W3rd United States Colored Cavalry Regiment
W3rd Cavalry Regiment (United States)
W4th Cavalry Regiment (United States)
W5th Cavalry Regiment
W5th United States Colored Cavalry Regiment
W6th Cavalry Regiment
W7th Cavalry Regiment
W8th Cavalry Regiment
W9th Cavalry Regiment (United States)
W10th Cavalry Regiment (United States)
W11th Armored Cavalry Regiment
W13th Cavalry Regiment
W14th Cavalry Regiment
W15th Cavalry Regiment
W16th Cavalry Regiment
W17th Cavalry Regiment
W17th Pennsylvania Cavalry
W26th Cavalry Regiment (Philippine Scouts)
W27th Cavalry Regiment
W28th Cavalry Regiment
W32nd Cavalry Regiment
W38th Cavalry Regiment
W40th Cavalry Regiment (United States)
W61st Cavalry Regiment (United States)
W71st Cavalry Regiment
W73rd Cavalry Regiment
W75th Cavalry Regiment
W89th Cavalry Regiment
W91st Cavalry Regiment
W134th Cavalry Regiment (United States)
W299th Cavalry Regiment (United States)
W301st Cavalry Regiment (United States)
W302nd Cavalry Regiment (United States)
W303rd Armored Cavalry Regiment
W303rd Cavalry Regiment (United States)
W304th Cavalry Regiment
W305th Cavalry Regiment (United States)
W306th Armored Cavalry Regiment
W308th Cavalry Regiment (United States)
W309th Cavalry Regiment (United States)
W310th Cavalry Regiment (United States)
W311th Cavalry Regiment (United States)
W312th Cavalry Regiment (United States)
W313th Cavalry Regiment (United States)
W314th Cavalry Regiment (United States)
W315th Cavalry Regiment (United States)
W316th Cavalry Regiment (United States)
W317th Cavalry Regiment (United States)
W318th Cavalry Regiment (United States)
W319th Cavalry Regiment (United States)
W320th Cavalry Regiment (United States)
W321st Cavalry Regiment (United States)
W322nd Cavalry Regiment (United States)
W323rd Cavalry Regiment (United States)
W324th Cavalry Regiment (United States)
WRough Riders