The Battle of Apple River Fort, occurred on the late afternoon of June 24, 1832 at the Apple River Fort, near present-day Elizabeth, Illinois, when Black Hawk and 200 of his "British Band" of Sauk and Fox were surprised by a group of four messengers en route from Galena, Illinois. One of the couriers was wounded in the thigh as the riders quickly made for the protection of the nearby stockade. Courier Fred Dixon lagged behind and provided cover for his comrades. The other couriers rode ahead to warn some 70 settlers of the approaching Sauk and Fox, thus saving their lives. The small company of militia at the fort, about 28-30 men and boys led by Captain Clack Stone, fought off Black Hawk's 150-man war party in an action that lasted about an hour. The withering pace of the gunfire eventually convinced Black Hawk that the fort was too heavily defended to lead a direct attack. He considered burning the fort, then switched to raiding cabins of foodstuffs, clothing and cooking utensils. In the gathering darkness, Black Hawk and his war party retreated.

Apple River Fort, today known as the Apple River Fort State Historic Site, was one of many frontier forts hastily completed by settlers in northern Illinois and southern Wisconsin following the onset of the 1832 Black Hawk War. Located in present-day Elizabeth, Illinois, United States, the fort at the Apple River settlement was built in less than a week. It was one of the few forts attacked during the war and the only one attacked by a band led by Black Hawk himself. At the Battle of Apple River Fort, a firefight of about an hour ensued, with Black Hawk's forces eventually withdrawing. The fort suffered one militia man killed in action, and another wounded. After the war, the fort stood until 1847, being occupied by squatters before being sold to a private property owner who dismantled the building.