After the Americans' flight early in May, Carleton took no significant offensive steps but on May 22, he sent ships carrying elements of the 47th and 29th Foot to Trois-Rivières under Allan Maclean's command. Brigadier General Simon Fraser led more forces to Trois-Rivières on June 2. By June 7, the forces on the ground at Trois-Rivières had grown to nearly 1,000, and 25 ships carrying additional troops and supplies were anchored in the river near the village and for several miles upriver. American arrangements Since Thomas's retreat was instigated by the early arrival of three ships of the fleet carrying only a few hundred troops, he was unaware of the true size of the British army. In a war council at Sorel on May 21, which included representatives of the Second Continental Congress, a decision was reached to make a stand at Deschambault, between Trois-Rivières and Quebec. This decision was reached based on sketchy reports and rumors of the British troop strengths and was dominated by the non-military Congressional representatives. Thomas contracted smallpox on May 21, from which he died on June 2. He was briefly replaced by Brigadier General William Thompson, who relinquished command to General John Sullivan when he arrived on June 5 at Sorel with further reinforcements from Fort Ticonderoga. 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. Battle The American crossing had been seen by a local militia captain, who rushed to the British camp at Trois-Rivières and reported to General Fraser. Thompson left 250 men to guard the landing and headed the rest towards Trois-Rivières. Unfamiliar with the local terrain, he convinced Antoine Gautier, a local farmer, to guide the men to Trois-Rivières. Gautier proceeded, apparently intentionally, to lead the American army into a swampy morass from which it took them hours to extricate themselves. In the meantime, the British, having