Hannibal had enemies.
In his first few years in Italy , he won three dramatic victories -- the Trebia , Lake Trasimene , and Cannae , in which he distinguished himself for his ability to determine his and his opponent 's strengths and weaknesses , and to play the battle to his strengths and the enemy 's weaknesses -- and won over many allies of Rome .	Italy	Italy	the Trebia	Battle of the Trebia	Lake Trasimene	Battle of Lake Trasimene	Cannae	Battle of Cannae
