WTU stands for Warrior Transition Unit (Army). Q: A: How to abbreviate Warrior Transition Unit (Army)? Warrior Transition Unit (Army) can be abbreviated as WTU. Q: A: What is the meaning of WTU abbreviation? The meaning of WTU abbreviation is Warrior Transition Unit (Army). Q: A: What is WTU abbreviation? One of the definitions of WTU is Warrior Transition Unit (Army). Q: A: What does WTU mean? WTU as abbreviation means Warrior Transition Unit (Army). Q: A: What is shorthand of Warrior Transition Unit (Army)? The most common shorthand of Warrior Transition Unit (Army) is WTU.