In 1763 the post was held by Ensign Francis Schlosser and fourteen men.

For months the little garrison had been without news from the east, when, on May 25, a party of Potawatomis from about Detroit arrived on a pretended visit to their relations living in the village at St Joseph, and asked permission to call on Schlosser.

But before a meeting could be arranged, a French trader entered the fort and warned the commandant that the Potawatomis intended to destroy the garrison.
Schlosser at once ordered his sergeant to arm his men, and went among the French settlers seeking their aid.
Even while he was addressing them a shrill death-cry rang out--the sentry at the gate had fallen a victim to the tomahawk of a savage.

In an instant a howling mob of Potawatomis under their chief Washee were within the stockade.

Eleven of the garrison were straightway put to death, and the fort was plundered.