DCG O&R means Deputy Commanding General for Operations and Readiness in Military
Similar to DCG O&R
1st - IOC 1st Information Operations Command Land1WVI - 1st West Virginia Infantry Regiment
1WVLA - 1st West Virginia Light Artillery Regiment
2 WVI - 2nd West Virginia Infantry Regiment
2-D - Two-Dimensional
201MIB - 201st Military Intelligence Battalion
20SCVI - 20th South Carolina Volunteer Infantry Regiment
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