b) Agent 711

Agent 711 was the secret code name used by George Washington for his spy network during the Revolutionary War. This network, also known as the Culper Spy Ring, played a crucial role in gathering intelligence on British activities and plans. The use of code names and numbers was a part of the sophisticated system of espionage developed by Washington and his spies. The effectiveness of this spy network contributed to several American successes and highlights the importance of intelligence in warfare.