In the Battle of Tinchebray in Normandy, the invading King Henry I of England captured his brother Robert Curthose.

The Battle of Tinchebray took place on 28 September 1106, in Tinchebray, Normandy, between an invading force led by King Henry I of England, and the Norman army of his elder brother Robert Curthose, the Duke of Normandy. Henry's knights won a decisive victory: they captured Robert, and Henry imprisoned him in England and then in Wales until Robert's death in 1134.

The Duchy of Normandy grew out of the 911 Treaty of Saint-Clair-sur-Epte between King Charles III of West Francia and the Viking leader Rollo. The duchy was named for its inhabitants, the Normans.

Henry I, also known as Henry Beauclerc, was King of England from 1100 to his death in 1135. He was the fourth son of William the Conqueror and was educated in Latin and the liberal arts. On William's death in 1087, Henry's elder brothers Robert Curthose and William Rufus inherited Normandy and England, respectively, thereby leaving Henry landless. He subsequently purchased the County of Cotentin in western Normandy from Robert, but his brothers deposed him in 1091. He gradually rebuilt his power base in the Cotentin and allied himself with William Rufus against Robert.

Robert Curthose, the eldest son of William the Conqueror, was Duke of Normandy as Robert II from 1087 to 1106.