During the next year, tensions began to rise quickly. Four settlers were murdered on the Missouri River, and in another incident, a boatload of supplies was seized by natives from a group of traders. Harrison summoned Tecumseh to Vincennes to explain the actions of his allies. In August 1811, Tecumseh met with Harrison at Vincennes, assuring him that the Shawnee brothers meant to remain at peace with the United States. Tecumseh then traveled to the south on a mission to recruit allies among the "Five Civilized Tribes". Most of the southern nations rejected his appeals, but a faction among the Creeks, who came to be known as the Red Sticks, answered his call to arms, leading to the Creek War, which also became a part of the War of 1812 Tecumseh delivered many passionate speeches and convinced many to join his cause.