Under President Woodrow Wilson, 116,516 soldiers died in World War I during 1917-18.
Under President Franklin Roosevelt, 405,399 died in WWII during 1941-45.
Under President Harry Truman, 54,246 died in Korea during 1950-53.
Under President John F. Kennedy, 191 died in Vietnam during 1961-63.
Under President Lyndon Johnson, 48,399 died in Vietnam during 1964-69.
Under President Richard Nixon, 21,194 American soldiers were killed in Vietnam during 1969-74.
Under President George H.W. Bush, 383 died in the Gulf War in 1991.
Under President George W. Bush, 4,371 died in Iraq during 2003-09, and 947 soldiers died during 2001-09 in Afghanistan.
Under President Barack Obama, 124 died in Iraq during 2001-09, and 1,749 soldiers died from 2009-16 in Afghanistan.
So, here are the totals:
626,761 soldiers killed under Democrat presidents.
26,895 soldiers killed under Republican presidents.