8 2 0 . ▁ ▁See ▁also ▁▁▁ 1 8 2 0 ▁and ▁ 1 8 2 1 ▁United ▁States ▁House ▁of ▁Representatives ▁elections ▁ ▁List ▁of ▁United ▁States ▁Representatives ▁from ▁Maryland ▁ ▁Notes ▁ ▁References ▁▁▁ 1 8 2 0 ▁Maryland ▁United ▁States ▁House ▁of ▁Representatives <0x0A> </s> ▁F ill is ▁is ▁a ▁surname . ▁Notable ▁people ▁with ▁the ▁surname ▁include : ▁ ▁James ▁F ill is ▁( 1 8 3 4 – 1 9 1 3 ), ▁English - born ▁French ▁r iding ▁master ▁John ▁F ill is ▁( c . ▁ 1 7 2 4 ▁– ▁ 1 7 9 2 ), ▁Canadian ▁merchant ▁and ▁politician <0x0A> </s> ▁The ▁Action ▁of ▁ 2 3 ▁August ▁ 1 9 6 7 ▁was ▁a ▁major ▁air ▁battle ▁which ▁involved ▁elements ▁of ▁the ▁Vietnam ▁People ' s ▁Air ▁Force ▁( VP AF ) ▁and ▁the ▁United ▁States ▁Air ▁Force ▁( US AF ). ▁The ▁air ▁battle ▁took ▁place ▁over ▁the ▁sk ies ▁of ▁North ▁Vietnam ▁as ▁part ▁of ▁Operation ▁Rol ling ▁Th under , ▁during ▁the ▁Vietnam ▁War . ▁ ▁On ▁ 2 ▁January ▁ 1 9 6 7 , ▁the ▁United ▁States ▁Air ▁Force ▁launched ▁Operation ▁B olo ▁with ▁the ▁aim ▁of ▁l uring ▁North ▁Vietnam ese ▁Mi G ▁f igh ters ▁into ▁an ▁air ▁battle , ▁where ▁they ▁could ▁be ▁destroyed ▁in ▁an ▁amb ush . ▁The ▁operation , ▁led ▁by ▁Colonel ▁Robin ▁Old s , ▁turned ▁out ▁to ▁be ▁a ▁major ▁success ▁after ▁five ▁North ▁Vietnam ese ▁Mi G -