Two grandchildren of World War Two-era U.S. presidents said the Chinese Nationalists' role in defeating Japan was as significant as the Communists in a rare joint appearance in Taiwan, as China launches its own high-profile parade marking the war's end.

Descendants of Franklin D. Roosevelt and Harry Truman — as well as of postwar President Dwight Eisenhower — said the Japanese were expelled by all Chinese, despite China's official narrative downplaying the wartime contribution of Nationalist government troops in battling the occupiers more than 70 years ago.

China focuses instead on Communist forces, who were also fighting an on-off civil war with the Nationalists, led by Chiang Kai-shek. The Nationalists fled to Taiwan in 1949 after losing the Chinese civil war.