Fort Pitt Museum Pitt, after William Pitt the Elder. As a result, in 1763 local Delawares and Shawnees took part in Pontiac's Rebellion, an effort to drive the British out of their territory. The Indians' siege of Fort Pitt began on June 22, 1763, but the fort was too strong to be taken by force. In negotiations during the siege, the commander of Fort Pitt gave two Delaware emissaries blankets that had been exposed to smallpox, in hopes of infecting the surrounding Indians and ending the siege. The effectiveness of this attempt is unclear. Outbreaks of smallpox had plagued Native Americans for years
Siege of Fort Henry (1777) of Virginia and Pennsylvania that Indians living in the Ohio Country were planning attacks on frontier settlements on and around the Ohio River. Fort Henry, which had been constructed in 1774 to protect the settlers in the area around what is now Wheeling, West Virginia, was one of the rumored targets. In early August, General Edward Hand, the commander at nearby Fort Pitt warned Lieutenant David Shepherd and all of the local militia captains of the threat, ordering them to gather at Fort Henry. For a time thereafter, militia companies stayed at Fort Henry, improving its defenses and patrolling for