•1/4 of british troops in north america surrendered • victory that assured american independence • turning point of the revolutionary war which of these major revolutionary war battles is described in the above box

The battle described in the above box is the Battle of Yorktown.

Explanation:

The Battle of Yorktown took place in 1781 during the Revolutionary War between September 26 and October 19, 1781. In that battle, rebel forces in the United States were supported by the French. Its main commanders were George Washington and Marquis de La Fayette, by the Americans, and Lord Cornwallis of the English.  

In 1780, the first French forces landed in the United States to support the Thirteen Colonies in their rebellion against British rule. In August, a force of 3,000 Americans, led by George Washington, and 4,000 Frenchmen marched to Virginia. A month later, French-American forces (which were twice the size of the British) surrounded the English fortress in Yorktown.  

The main British fort in Yorktown where Charles Cornwallis, then commander-in-chief of the English army in North America, was entrenched, began to be bombed on September 28, by sea and land. The Allies then invested three times against British forces, with little success. However, the situation of the British began to deteriorate as casualties accumulated and provisions became scarce. On October 14, General Washington attacked the enemy's lines, weakening them. On the 17th of the same month, the British military besieged in Yorktown proposed terms for surrender. Two days later, Cornwallis and his officers formally handed over their swords and surrendered their forces.

English surrender in Yorktown marked the end of British armed resistance to the independence of the United States. Two years later, a treaty was signed between the countries, putting an end to hostilities. By this agreement, the British formally recognized the emancipation of the United States and its secession from the rest of the British Empire.