William the Lion Captured at the Battle of Alnwick
On July 12, 1174, William I of Scotland—known as William the Lion—was captured by English forces at the Battle of Alnwick in Northumberland. He had invaded northern England in support of a wider rebellion against King Henry II, hoping to secure control over disputed territories. According to chroniclers, an English cavalry force surprised William near Alnwick and took him prisoner in the fighting. His capture forced Scotland into the humiliating Treaty of Falaise later that year, tightening English overlordship over the Scottish crown for more than a decade.