Question: when did panama canal zone became a us territory
Answer: Under the treaty , Panama received US $ 10 million , much of which the United States required to be invested in that country , plus annual payments of US $250,000 ; with those payments made , as well as for the purchase of the French company assets , the Canal Zone was formally turned over by Panama on May 4 , 1904 , when American officials reopened the Panama City offices of the canal company and raised the American flag .