This Richard Marshall was born ~1757, probably in Virginia, and was part of Virginia regiments during the American Revolutionary War. According to his wife, Keziah, she and Richard were married in Virginia in 1784, probably in Spotsylvania.
He came to Ohio, probably before 1809, and spent the rest of his life in or around Muskingum County, Ohio.
Information about his military services comes from the Pension Application of Richard Marshall, kindly transcribed by Will Graves, who maintains a website for Southern Campaigns Revolutionary War Pension Statements & Rosters.
Census records of 1800 and 1810 for Ohio were mostly destroyed in a fire, so it’s difficult to track those who came to Ohio during the critical period of settlement from 1790 to 1820. I infer that Richard Marshall came to Ohio before 1809 because there is a record of the marriage of his daughter Frances “Franky” Keziah in that year. That’s the only record of Frances that I’ve been able to find, but I am confident that she’s Richard and Keziah’s daughter based on a variety of records establishing that Marshal and Elizabeth Stults are Richard Marshal’s grandchildren.
U. S. Census records for Muskingum County, OH place Richard there from 1820 until his death in 1841.