Answer;
The fighting in Iwo Jima and Okinawa affected the Allies' Pacific strategy in that; Truman decided to drop the atomic bomb on mainland Japan.
Explanation;
President Turman, ordered that the new weapon (atomic bomb) be used to bring the war to a speedy end.
On August 6, 1945, the American bomber Enola Gay dropped a five-ton bomb over the Japanese city of Hiroshima.