"Leo T. Leyden, a Marine killed in action on June 15, 1918, was the first Denver soldier to fall in the conflict. His body was returned more than three years later in early September 1921" (15 jun 1918 año – 1 sept 1921 año)
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fecha:
15 jun 1918 año
1 sept 1921 año
~ 3 years and 2 months