What led to europe's involvement in world war ||? japanese attack on pearl harbor. germany's military build up and invasions of multiple european countries. the death of president von hindenburg ignited europe's involvement. the need for a better economy caused europe to be involved.

Two gymnastics teams are intense rivals. the first team has started recruiting new gymnasts from different cities and even foreign countires in an effort to build a stronger team. after learning this, the secondteam begins its own recruitment campaign to find better gymnasts. over a period of months, each team recruits dozens of players, each time trying to find a better recruit than its rivals most recent addition. which idea from the cold war is most similar to this scenario