The September 1812 siege
Fort Madison was poorly placed from the start. It sat at the base of a bluff next to a ravine, ground from which attackers could fire down into the post. About sixty soldiers held a five-cornered fort roughly 120 by 160 feet.
By September 1812 the War of 1812 had reached the Upper Mississippi. The fort was besieged hard that month and came close to being overrun. Attackers set up a fortified position within range of the walls. The siege turned when cannon fire from the fort destroyed that position, and the assault could not be sustained.
It was a reprieve, not a victory. The garrison would hold on for another year before the situation became impossible.