Two US Marines were captured during the battle , neither of whom survived their captivity .
Iwo Jima was also the only U.S. Marine battle where the American casualties exceeded the Japanese , although Japanese combat deaths numbered three times as many as American deaths .
Two US Marines were captured during the battle , neither of whom survived American 's captivity .
Iwo Jima was also the only U.S. Marine battle where the American casualties exceeded the Japanese , although Japanese combat deaths numbered three times as many as American deaths .