He was the last president born as a British subject in the Thirteen Colonies before the start of the Revolutionary War in 1775. During his early military career, he participated in the 1794 Battle of Fallen Timbers, an American military victory that effectively ended the Northwest Indian War. Later, he led a military force against Tecumseh's Confederacy at the Battle of Tippecanoe in 1811, where he earned the nickname 'Old Tippecanoe'. Clay was not the only one who hoped to benefit from Harrison's election. Hordes of office applicants came to the White House, which (at the time) was open to all who wanted a meeting with the president. Most of Harrison's business during his month-long presidency involved extensive social obligations and receiving visitors at the White House. They awaited him at all hours and filled the Executive Mansion. Harrison wrote in a letter dated March 10, 'I am so much harassed by the multitude that calls upon me that I can give no proper attention to any business of my own.'