National World War I Museum, Kansas City, Missouri, USA
United States Marines and Sailors posing on unidentified ship in 1918.
World War I ended 100 years ago on Sunday.
It was a brutal war that lasted more than four years and killed an estimated 8.5 million soldiers and 13 million civilians.
It was also a war that cemented the US as a world power, rising to the level of the colonial European powers from which so many Americans and their ancestors had fled.
But the US has been embroiled in war or conflict for much of the century since the Great War ended.
And the following iconic war photos show that path.