, ▁lub ric ation , ▁and / or ▁oil ▁supply ▁targets ▁ ▁and / or ▁ ▁— ▁events ▁regarding ▁Al lied ▁planning ▁▁ ▁— ▁R AF , ▁E ighth ▁Air ▁Force , ▁and ▁other ▁round els ▁indicate ▁units ▁( most ▁list ings ▁are ▁from ▁the ▁R AF ▁chron ology ▁and ▁the ▁USA AF ▁chron ology ) ▁" 1 0 0 ▁B G " ▁— ▁list ings ▁that ▁include ▁the ▁unit ▁abbre viation ▁( B G ▁is ▁Bomb ard ment ▁Group ) ▁are ▁from ▁the ▁corresponding ▁mission ▁history ▁for ▁the ▁unit . ▁ ▁Notes ▁Notes ▁ ▁Cit ations ▁ ▁References ▁ ▁May - J une ▁ 1 9 4 0 ▁( B attle ▁of ▁France ), ▁June - Oct ober ▁( B attle ▁of ▁Britain ) ▁ 1 9 4 0 , ▁July - Dec ember ▁ 1 9 4 0 ▁ 1 9 4 1 : ▁January - A pril , ▁May - August , ▁September - ▁December ▁ 1 9 4 2 : ▁January , ▁February , ▁March , ▁April , ▁May , ▁June , ▁July , ▁August , ▁September , ▁October , ▁November , ▁December ▁ 1 9 4 3 : ▁January , ▁February , ▁March , ▁April , ▁May , ▁June , ▁July , ▁August , ▁September , ▁October , ▁November , ▁December ▁ 1 9 4 4 : ▁January , ▁February , ▁March , ▁April , ▁May , ▁June , ▁( D - Day ), ▁July , ▁August , ▁September , ▁October , ▁November , ▁December ▁January ▁ 1