During world war ii, who was the leader of the united states' troops on the pacific front?

When did paul zoll develop cardiac pacemaker

Sparta faces threats from without and within the city-state who posed these threats.

Match each person with his contribution. aristotle socrates eratosthenes hippocrates he studied the causes of illnesses in search of cures. he created a teaching method that involved asking questions. he determined that earth was round. he educated alexander the great.