Final answer:
General George S. Patton significantly contributed to World War II by leading key campaigns, especially with the US Third Army in the Battle of the Bulge, and was known for his aggressive leadership style.
Step-by-step explanation:
General George S. Patton's main contribution to World War II was his leadership during key military campaigns, particularly in North Africa, Sicily, and the European theatre. Patton was renowned for his rapid offensive tactics and his ability to inspire troops, which was evident when he led the US Third Army in a crucial rescue operation during the Battle of the Bulge. Despite his controversial views, Patton's aggressive style of personal leadership and his bold actions on the battlefield played a significant role in the Allies' victory.