In June 1861, the Sanitary Commission set up its central office inside the United States Treasury Building, just east of the Executive Mansion (now the White House), on Pennsylvania Avenue and 15th Street in central Washington, D.C. By late October 1861, the USSC Central Office and the U.S. War Department had received detailed studies and reports from the Sanitary Inspectors of more than four hundred regimental camp inspections. The rapidly crowded events of those first six months of the war displayed the sheer gravity of the situation in which the adjustment to the means and agencies were desperately needed to ensure a high health-rate in all those untrained Union Army regiments.