After the war he settled in Carlisle, Pennsylvania, and opened a grocery store. He became a member of the Society of the Cincinnati. Military service again beckoned, and in August 1784 he was commissioned a captain in the United States Army to serve on the Ohio Valley frontier under Colonel Josiah Harmar. In 1789 he was promoted to major by President George Washington. That year he commanded the military escort to Native Americans, including Chief Cornplanter, at the Treaty of Fort Harmar near Marietta, Ohio. While stationed at Fort Harmar, Ziegler married Lucy Anne Sheffield on February 22, 1789. Sheffield was a native of Rhode Island, and had come to Marietta with her widowed mother, who was a shareholder in the Ohio Company. The