Final answer:
The end of the French and Indian War happened less than 20 years before the start of the Revolutionary War.
Step-by-step explanation:
The event that happened less than 20 years before the start of the Revolutionary War was the end of the French and Indian War. The French and Indian War, which took place from 1754 to 1763, was a conflict between Great Britain and France over control of North America. Its conclusion marked a turning point in British colonial policy and greatly contributed to the tensions that led to the American Revolution.
Learn more about Events before the Revolutionary War