The Virginia governor commissioned George Washington to claim the Ohio River Valley for themselves during the French and Indian War. At this point in time, the United States wasn’t a thing. George Washington was still very much a British soldier, and a somewhat loyal one, to start. For those who don’t know, and I didn’t know this before researching for this question, Washington’s actions in the American Revolutionary War were influenced by his time serving for the British during the French and Indian War.
Either way, the Virginia governor wanted the British government to do more than they had been doing to stop the French from claiming the Ohio River Valley for themselves. Due to his vocal interest in this, he was given the power to fight the French. Hence his calling Washington for help.