Welcome to Today in Military History, a new feature that offers a glimpse of important military events of the past, courtesy of Strategypage.com!

Here are some important events that took place on June 25:

1139: Alfonso I of Portugal defeats the Moors.

1483: Richard of Glocester declares his 12-year-old nephew illegitimate and ascends to the British throne as King Richard III. Historical tradition (and Shakespeare) says that he later murdered the child, though the evidence for this is sketchy. Richard himself would later be deposed by Henry VII.

1863: George G. Meade replaces Joseph Hooker as the commander of the Army of the Potomac.

1876: George Custer makes the worst (and last) call of his life when he decides to head into Little Big Horn.

1942: Dwight D. Eisenhower takes command of U.S. forces in Europe.