 Ramba uchinyora ndima iyi - Murwendo rwayo rwokutanga, Groves yakapiwa basa rokutsigira mauto eU.S. Marines aiva panhandare yendege muBeirut, kuLebanon. Kusvika nokukurumidza pashure pokubhomba mabhara muna 1983, akagoverwa kuti atore helikopta kubva, zvichibvumira New Jersey kushandisa zvose zvitatu zvayo turrets kurwisa zvinangwa muBekaa Valley. Mukuwedzera, Groves yakadzivirira New Jersey namamwe mapoka epamusoro pamhepo. Yakatevera ngarava dzepasi pemvura dzisina kuzivikanwa, yakatarisa kufamba kwaYasser Arafat kubva kuBeirut kuenda kuCyprus, ndokupinda muchiteshi cheBeirut nemamwe mauniti kuti aite rutsigiro rwakananga rwekupisa kumayuniti anovenga nzvimbo dzeUSMC. Groves akapiwa Meritorious Unit Citation nokuda kwezviito izvi. 