OHDACA means Overseas Humanitarian, Disaster, and Civic Aid in Military
Similar to OHDACA
129 RQW - 129th Rescue Wing12N - Horizontal Construction Engineer
13 SCVI - 13th South Carolina Volunteer Infantry Regiment
13AD - 13th Airborne Division
13B - Military Occupational Specialty code for Cannon Artilleryman
147FA - 147th Field Artillery Regiment
15MG - 15 Militia Group
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