Philip Astley, 24, returned to London a new man: Seven years backing cavalry horses in Col. Granville Elliot’s 15th Light Dragoons had quashed the familial tensions he’d joined the army to avoid. Alongside the Prussians in the French and Indian war, he’d rescued the Duke of Brunswick from enemy territory. By his discharge in 1776, he’d risen to a stature of 6 feet and a rank of sergeant major. Elliot, now a general, bestowed upon his soldier an opulent parting gift: a white stallion named Gibraltar.

