The correct answer is The French and Indian War.
The French and Indian War took place between 1754-1763. This fighting between France and Britain/colonists in North America was due to a dispute over territory in the Ohio River Valley. At this time, Washington was a soldier in the British colonial army. He was a high ranking officer and was involved in several battles throughout this war. His service in the French and Indian War prompted him to fame throughout the 13 colonies. He would continue to build on this fame throughout the Revolutionary era.