Very doubtful. Anyone old enough to serve in World War 1 would have been quite elderly by the time Vietnam began. Douglas MacArthur was a general in both world wars and Korea, but he was retired and died before regular US forces were committed to Vietnam.
3500
So few served in all three that the number is very small estimate less than 1000 in 2012
The number of German soldiers who served in the German Military in World War I was 13,250,000. The number of American military personnel that served during World War I was 4,743,826.
Between 12-13 million soldiers served in the German Defense Force - or Wehrmacht - in the Second World War.
No comparision; Korea compares to WW1.
3500
So few served in all three that the number is very small estimate less than 1000 in 2012
There are only three soldiers buried in the Tomb of the Unknown. One each from WWI, WWII and Korea. The unknown from Vietnam was removed when DNA identified him.
Revolutionary War, The War of 1812, The Mexican War, the Civil War, World war 1, world war 2, Korea, Vietnam, Iraq and Afghanistan.
After I enlisted in the Navy in 1974, I served with several Navy Seabees who had fought in World War II, Korea and Vietnam. Service members who retired after 30 years during that time would have served in all three wars.
There were many soldiers that served in World War I from around the world. The state of Oklahoma provided 75 of these soldiers.
Canada has lost soldiers fighting in the Boer Wars, WW1, WW2, Korea, Vietnam, Iraq, and Afghanistan. - And in peacekeeping all over the world.
This is definitely possible. A WW 1 vet would have been born around 1900 and would put him in his late 50's. There were Vietnam vets this age who served in the Gulf War. This also could mean that it was possible for a Vet to have served in WW 1, WW 2, Korea and Vietnam.
4,734,991 U.S. servicemembers served in World War I.
WWII men fought the good war. Vietnam returnees were treated as losers.
Korea and Vietnam were the only HOT Battles of the cold war; a war between the communist world and the free world.
The number of German soldiers who served in the German Military in World War I was 13,250,000. The number of American military personnel that served during World War I was 4,743,826.