Why was Braddock defeated by a smaller enemy force?

Braddock was defeated by a smaller enemy force during the Battle of the Monongahela primarily due to a combination of underestimating the tactical capabilities of the French and their Native American allies, as well as his rigid traditional military tactics. He relied heavily on linear formations typical of European warfare, which proved ineffective in the dense, wooded terrain of North America. Additionally, the surprise and guerrilla tactics employed by the smaller force caught Braddock's troops off guard, leading to disarray and a devastating defeat.