The last US civil war widows' pension was payed until 2003, when the lady died. The way was in 1865;
On April 9, 2011, The Economist commented on the lady:
"When Gertrude Janeway died in 2003, she was still getting a monthly check for $70 for a military pension earned by her late husband, John, on the Union side of the American civil war that ended in 1865. The pair had married in 1927, when he was 81 and she was 18. The amount may have been modest but the entitlement spanned three centuries".
Up to two years ago at least, and possibly today, they're still paying two "children's" civil war pension from the people's late fathers entitlement.