The Native American tribes north of the Ohio River were preparing to launch a major attack on the frontier settlements. On August 24, Colonel Brodhead sent a letter to the commander of Fort Henry warning him of the enemy's advance and ordering him to spread the alarm to the surrounding inhabitants.
Fort Henry was prepared for the attack when the enemy arrived, and the attack was repelled. However, a few prisoners were taken. A friendly Moravian from the Christian Indian villages on the Muskingum River had warned of the attack, and the enemy retaliated by breaking up the Gnaddenhutten community on the Tuscarawas River. The Moravians were forced to relocate to Sandusky, where they could no longer act as informants for the Americans.
The four attacks on Fort Henry of which there is any evidence occurred in February 1777, September 1777, September 1781 and the last in September 1782. There were quite possibly other raids which were never reported, or for which the accounts have been lost. (https://shorturl.at/bhvP0) (https://shorturl.at/hwRSY) (https://shorturl.at/bcez1) (https://tinyurl.com/4d46r2f6)