American Civil War widows who survived into the 21st century
At least four widows of veterans of the American Civil War (fought 1861–1865) are known to have survived into the 21st century. All were born in the 20th century and married their husbands while the women were still young and the men were in advanced age.
Source: Wikipedia — American Civil War widows who survived into the 21st century (CC BY-SA 4.0)