 On June 5, just hours before Sullivan's arrival, Thompson sent 600 troops under the command of Colonel Arthur St. Clair toward Trois-Rivières with the goal of surprising and beating back the small British force believed to be there. Sullivan, on his arrival at Sorel, immediately dispatched Thompson with an additional 1,600 men to follow. These forces caught up with St. Clair at Nicolet, where defenses against troop movements on the river were erected the next day. On the night of June 7, Thompson, St. Clair, and about 2,000 men crossed the river, landing at Pointe du Lac, a few miles above Trois-Rivières.
