ahem ahem-
SPEAK ENGLISH OR NO ONES GOING TO BE HELPING YA
Chivalry. It's not really behavior so much as "I'm more powerful than you and I want your daughter, give me your daughter or I'll kill you", but your history teacher will want the answer chivalry, so I suggest you answer that, lol.
It was lasted over 9 years from December 1979 to February 1989