John Palsgrave Wyllys[1] (1754-1790) was a United States Army officer from Connecticut.

[4] Wyllys began his American Revolutionary War service during the Siege of Boston.

[2] He took part in the Harmar campaign of 1790,[9] and was in command of the combined U.S. regular and militia force in the climactic Battle of Kekionga on 22 October 1790.

After Wyllys and his 60 regulars crossed the St. Joseph River, they were ambushed in an open field.

A non-commissioned officer of the regiment reported seeing a Native American flaunting Wyllys' large hat.