William Fleming was born on February 18, 1727, in Jedburgh, Scotland, into a family whose precise circumstances are not fully recorded in standard biographies. He received a strong education and trained in medicine at the University of Edinburgh, one of Europe’s leading centers of medical instruction. Edinburgh exposed students to anatomy, surgery, chemistry, and the empirical methods reshaping eighteenth-century medicine. Fleming entered British naval service as a surgeon’s mate and gained practical experience treating wounds and disease at sea. Naval medicine demanded speed, endurance, and improvisation under crowded and unsanitary conditions. He later traveled to Virginia and served as a surgeon during the French and Indian War, including with provincial forces on the frontier. After the war, Fleming settled in western Virginia. He practiced medicine and acquired land in the region that became Botetourt County. Frontier physicians traveled long distances and treated settlers with limited supplies. Fleming’s military background and education made him especially valuable in communities where trained doctors were scarce. He married Anne Christian, sister of the frontier leader William Christian, linking him to another influential western family. They established a household at Belmont and raised children. Fleming combined medical practice with farming, landownership, militia responsibilities, and county office. His property included enslaved laborers, reflecting the expansion of Virginia’s plantation order westward. Before becoming a Revolutionary officer and acting governor, Fleming had been shaped by Scottish education, naval medicine, wartime surgery, transatlantic migration, frontier settlement, marriage, and professional service. He entered American public life not as a young political theorist but as a mature physician accustomed to crisis and responsibility. His movement from Jedburgh and Edinburgh to Virginia’s backcountry also gave him a perspective broader than that of leaders raised entirely within one county or colony.