The father of Joseph is John b. 1714 and as Gayle Mark pointed out there is no record of him having served in the military. However there is a question about Joseph's brother John b. 1743. There is a listing in the DAR register for a John Bozarth b. c 1740 d. 1790. I have never had time to follow up on how this got listed by the DAR as it is thought that he was homesteading land in Monongalia Co. VA at the time of the Revolutionary War.