During the French and Indian War, the British had all the advantages, and launched their final campaign against the French, who were refugees in Montreal; all their supplies were cut off, the British dominated by all directions access to the city, and the Iroquois Indians gave them their military support. In the summer of 1760, the British attacked by three fronts of war, an army of 3,000 soldiers left from Quebec to the West, by the Saint Lawrence. A larger army (3,500 soldiers) advanced north from Lake Champlain, and a third army, the largest of them, with 11,000 soldiers, used Lake Ontario to sail to Montreal. The governor of Montreal surrendered, and the city was won without battle, 8 of September of 1760.