The Battle of the Monongahela (also known as the Battle of Braddock's Field and the Battle of the Wilderness) took place on 9 July 1755, at the beginning of the French and Indian War, at Braddock's Field in what is now Braddock, Pennsylvania, 10 miles (16 km) east of Pittsburgh. A British force under General Edward Braddock, moving to take Fort Duquesne, was defeated by a force of French and Canadian troops under Captain Daniel Linard de Beaujeu with its American Indian allies.

The defeat marked the end of the Braddock Expedition, by which the British had hoped to capture Fort Duquesne and gain control of the strategic Ohio Country. Both Braddock and Beaujeu were killed in action during the battle, with Braddock being mortally wounded in the fight and dying during the retreat near present-day Uniontown, Pennsylvania. He specifically asked for George Washington, who accompanied him on the march, to oversee his burial. The remainder of the column retreated south-eastwards and the fort, and region, remained in French hands until its capture in 1758.

The Native Americans allied to the French were stealthy and used the terrain to their advantage in order to cause a large number of British casualties. The French ambushed the British as they were more prepared for the combat, which was the cause of their success in this battle.



The Braddock expedition, also called Braddock's campaign or (more commonly) Braddock's Defeat, a failed British military expedition, attempted to capture the French Fort Duquesne (established in 1754, located in present-day downtown Pittsburgh) in the summer of 1755, during the French and Indian War of 1754 to 1763. The British troops suffered defeat at the Battle of the Monongahela on July 9, 1755, and the survivors retreated. The expedition takes its name from General Edward Braddock (1695-1755), who led the British forces and died in the effort. Braddock's defeat was a major setback for the British in the early stages of the war with France; John Mack Faragher characterises it as one of the most disastrous defeats for the British in the 18th century.