What branch of the federal government has the power to overrule state laws that violate the u.s. constitution?

Explanation:

1. Battles of Lexington and Concord

The Battles of Lexington and Concord, fought on April 19, 1775, were the first military clashes of the American Revolutionary War.

2. The Battle of Saratoga

The Battle of Saratoga occurred in September and October, 1777, during the second year of the American Revolution. It included two crucial battles, fought eighteen days apart, and was a decisive victory for the Continental Army and a crucial turning point in the Revolutionary War.

3. Battle of Yorktown

Battle of Yorktown

It was there in 1781 that a combined French and American army led by George Washington defeated and captured General Cornwallis and his army. This defeat was the last major battle of the Revolutionary War and forced Great Britain to decide to come to the negotiating table.