ACS, C4I means Assistant Chief of Staff, Command, Control, Communications, Computers, and Intelligence in
Military
Similar to ACS, C4I
15MG - 15 Militia Group
17AD - 17th Airborne Division
180FA - 180th Field Artillery Regiment
189FA - 189th Field Artillery Regiment
1BCT - First Brigade Combat Team
1CAV - 1st Cavalry Division
1CD - 1st Cavalry Division
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