Adlertag
Adlertag ( "Eagle Day" ) was the first day of "Unternehmen Adlerangriff" ( "Operation Eagle Attack" ) , which was the codename of a military operation by Nazi Germany's "Luftwaffe" ( German air force ) to destroy the British Royal Air Force ( RAF ) . 
<triplet> Luftwaffe <subj> Nazi Germany <obj> applies to jurisdiction <triplet> Royal Air Force <subj> British <obj> country