Joseph enlisted 26 May 1943 and began his training at Camp Wheeler, Georgia. It is unknown when he was sent to England but this was probably fairly early in 1944. CPL Vagasi was transferred from the replacement depot to L Company 116th Infantry on 22 Jun 1944. He was serving as a squad leader when he was wounded in the effort to liberate Saint-Lo, dying of his wound(s) on 12 Jul 1944.
CPL Vagasi was repatriated in 1948 and re-interred in the Gettysburg National Cemetery in Gettysburg, Pennsylvania.