Fort Armstrong (Rock Island, Illinois)

Rock Island · Illinois · Indian Wars

Quick BriefFort Armstrong, established 1816–1836, was one of a chain of western frontier defenses erected after the War of 1812, located at the foot of Rock Island in the Mississippi River near present-day Quad Cities. The fort protected American settlers and helped control the Sauk in the region. On September 21, 1832, the Black Hawk War officially ended with a treaty signed at Fort Armstrong, by which defeated Sauk and Fox Indians ceded lands east of the Mississippi River.
Open to visitors
Fort Armstrong, Illinois

History & Significance

Construction began on May 10, 1816, with 600 soldiers and 150 laborers assigned to the project; it was named for John Armstrong, Secretary of War under President James Madison. The fort, built of stone and timber in a 300-foot square, was completed in 1817 and consisted of three large blockhouses at prominent corners.

After construction, fewer than 200 soldiers garrisoned the post. During the Black Hawk War of 1832, General Winfield Scott led 1,000 troops to Fort Armstrong; by the time troops reached Rock Island only 220 soldiers remained alive, having contracted cholera en route, and within eight days, 189 people died in a local epidemic.

The fort was garrisoned by United States troops until May 4, 1836; it then served as headquarters for the Sauk and Fox Indian Agent from 1836 to 1838 and as a military depot from 1840 to 1845. The fort was destroyed by fire in 1855.

Key Facts

StateIllinois
LocationRock Island
Established1816
Decommissioned1836
War / eraIndian Wars
Current statusMuseum / Historic Site
Coordinates41.5165, -90.5639

Map

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🧳 Visiting

What you’ll see when you visit:

  • Historic frontier military post on Mississippi River island
  • Black Hawk War era barracks and fortification ruins
  • Indian affairs administration and settler-Native American trade hub
  • Museum exhibits on War of 1812 and regional frontier history
Best time to visitSpring (April-May) and fall (September-October) offer mild weather; summers are warm and humid, winters cold across Illinois.
Getting thereQuad City International Airport (MLI) is 8.9 km from the fort; the site is accessible from Rock Island, Illinois.
From the nearest major airportChicago O'Hare International Airport (ORD)🚗 169 mi by road⏱️ ≈ 3 hr 38 min drive

Sources

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