In April 1812, as the United States prepared for a possible war with Great Britain, Michigans Territorial Governor William Hull, became the commander of the Army of the Northwest. His first task was to lead his army from Dayton, Ohio to Detroit, building Hulls Trace, a two hundred mile long road, as it marched. The army left Dayton on June 1. As it cut the trace through the wilderness from Urbana north, it laid logs crosswise across swampy areas to create a rough but stable corduroy roadbed that could support supply wagons. In late June, a detachment from Frenchtown commanded by Hubert Lacroix also worked on the road, attempting to follow a route laid out under an 1808 territorial Legislative Council act. On June 18, 1812, war was declared. Hulls army arrived in Detroit on July 5.