The global war ended in February 1763. Britain now administered Canada and a vast interior, faced strained relations with Indigenous nations of the Great Lakes and Ohio valleys, and carried heavy war debts. London chose to keep a large peacetime garrison in North America—no longer chiefly to fight France or Spain, but to stabilize the frontier and regulate expansion while formal diplomacy resumed with Indigenous partners [ 1 ].
The Royal Proclamation and the Appalachian line
On 7 October 1763 the Crown issued the Royal Proclamation, drawing an administrative boundary along the Appalachian crest. Lands west of that line were reserved as an “Indian Country,” and private purchases were banned; only the Crown could acquire land at public treaty councils. The aim was to reduce violence and route expansion through negotiation. On the ground, the line clashed with land companies, veterans’ grants, and settler movement, and it would be adjusted by later treaties [ 2 , 3 ].
Policing settlers west of the line: cabin burnings and removals
After 1763 the role of the redcoat changed. Instead of fighting external French or Spanish enemies, units on many frontiers were ordered to restrain British subjects: interdict unauthorized traders, evict squatters, and—documented in western Pennsylvania and the Upper Ohio—burn illegal cabins beyond the line. Contemporary reports and later scholarship describe patrols in the early 1760s that destroyed dozens of squatter dwellings, a visible shift from defense against outsiders to policing imperial subjects [ 4 , 5 ].
Fort Pitt, 1763: siege, smallpox, and contested methods
The enforcement regime unfolded amid Pontiac’s War (1763–64), when Indigenous coalitions seized or besieged most forts west of the Appalachians. During the Fort Pitt siege, smallpox was already present. Surviving documents show an attempt to use infected textiles: a trader‑officer recorded giving two blankets and a handkerchief from the smallpox hospital to emissaries; separate correspondence between General Jeffery Amherst and Colonel Henry Bouquet discussed spreading smallpox among opponents. Scholars debate effectiveness, but the sources establish intent and attempt within a wider outbreak [ 6 , 7 , 8 ].
From frontier enforcement to urban garrisons and protest
The same army that tore down illegal cabins also guarded customs houses and patrolled port cities. Parliament’s revenue and enforcement laws—intended in part to fund the peacetime army—tightened imperial oversight. By the late 1760s many colonists perceived that the redcoat no longer stood between them and foreign enemies, but between them and their own ambitions. That perception tied western land rules to urban protests over taxes and quartering, helping to turn discontent into a wider political crisis [ 1 ].
Valley Forge and the inoculation policy (1777–1778)
Smallpox shadowed armies and civilians throughout the 1775–1782 epidemic. In early 1777, to blunt its impact, General George Washington ordered inoculation for the Continental Army. During the Valley Forge winter (1777–78) inoculation was carried out for troops and recruits, reducing catastrophic outbreaks even as disease generally remained the chief killer in camp life [ 9 , 10 , 11 ].
Epilogue: a continental epidemic
The 1775–1782 smallpox epidemic moved along travel and trade routes across North America. It shaped strategy, migration and demography far beyond the Atlantic seaboard. This page closes in 1778; a later chapter can pick up the westward story and its local impacts.