The Army of the Northwest was a U.S. Army unit formed at the outset of the War of 1812

War of 1812

The War of 1812 was a military conflict fought between the forces of the United States of America and those of the British Empire. The Americans declared war in 1812 for several reasons, including trade restrictions because of Britain's ongoing war with France, impressment of American merchant...

 and charged with control of the state of Ohio

Ohio

Ohio is a Midwestern state in the United States. The 34th largest state by area in the U.S.,it is the 7th‑most populous with over 11.5 million residents, containing several major American cities and seven metropolitan areas with populations of 500,000 or more.The state's capital is Columbus...

, the Indiana Territory

Indiana Territory

The Territory of Indiana was an organized incorporated territory of the United States that existed from July 4, 1800, until November 7, 1816, when the southern portion of the territory was admitted to the Union as the state of Indiana....

, Michigan Territory

Michigan Territory

The Territory of Michigan was an organized incorporated territory of the United States that existed from June 30, 1805, until January 26, 1837, when the final extent of the territory was admitted to the Union as the State of Michigan...

 and Illinois Territory

Illinois Territory

The Territory of Illinois was an organized incorporated territory of the United States that existed from March 1, 1809, until December 3, 1818, when the southern portion of the territory was admitted to the Union as the State of Illinois. The area was earlier known as "Illinois Country" while under...

.

Campaigns

The first commander William Hull

William Hull

William Hull was an American soldier and politician. He fought in the American Revolution, was Governor of Michigan Territory, and was a general in the War of 1812, for which he is best remembered for surrendering Fort Detroit to the British.- Early life and Revolutionary War :He was born in...

 was in charge while the regiment was at Detroit, before surrendering it to the British. James Winchester

James Winchester

James Winchester was an officer in the American Revolutionary War and a brigadier general during the War of 1812. He commanded the American forces at the Battle of Frenchtown, which led to the Massacre of the River Raisin....

 then led the army back up north towards Detroit, but turned to defend Fort Defiance

Fort Defiance (Ohio)

Fort Defiance was ordered built by General "Mad" Anthony Wayne in August 1794 at the confluence of the Auglaize and Maumee rivers. It was the last of a line of defenses constructed by American forces in the campaign leading to the Northwest Indian War's Battle of Fallen Timbers on August 20,...

 instead. Perhaps due to Winchester's unpopularity, President James Madison

James Madison

James Madison, Jr. was an American statesman and political theorist. He was the fourth President of the United States and is hailed as the “Father of the Constitution” for being the primary author of the United States Constitution and at first an opponent of, and then a key author of the United...

 soon appointed William Henry Harrison

William Henry Harrison

William Henry Harrison was the ninth President of the United States , an American military officer and politician, and the first president to die in office. He was 68 years, 23 days old when elected, the oldest president elected until Ronald Reagan in 1980, and last President to be born before the...

 as commander of the army in late 1812.
Commanders=
The following men served as commanders of the Army of the Northwest:

• William Hull
  William Hull
  William Hull was an American soldier and politician. He fought in the American Revolution, was Governor of Michigan Territory, and was a general in the War of 1812, for which he is best remembered for surrendering Fort Detroit to the British.- Early life and Revolutionary War :He was born in...
  
  
• James Winchester
  James Winchester
  James Winchester was an officer in the American Revolutionary War and a brigadier general during the War of 1812. He commanded the American forces at the Battle of Frenchtown, which led to the Massacre of the River Raisin....
  
  
• William Henry Harrison
  William Henry Harrison
  William Henry Harrison was the ninth President of the United States , an American military officer and politician, and the first president to die in office. He was 68 years, 23 days old when elected, the oldest president elected until Ronald Reagan in 1980, and last President to be born before the...
  
  
• Duncan McArthur
  Duncan McArthur
  right|thumb|350pxDuncan McArthur was a Federalist and National Republican politician from Ohio. He served as the 11th Governor of Ohio....