Crossword clues for Branch of the service: Abbr. 3 letters:USMService branch: Abbr.AAFService branch: Abbr.NAVService branch: Abbr.USNService branch: Abbr.AAFBranch of service: Abbr.OTCBranch of the service: Abbr.USMCCertain service branch (abbr.)USAFService branch: Abbr.USCGService branch: Abbr.USAFBranch of the service (Abbr.)USAFService branch with jets: Abbr.USMCBranch of the armed services: Abbr.