1770 October 0
George Washington arrived for a visit in Pittsburgh. He noted in his diary: "We lodged in what is called the Town, distant about 300 yards from the Fort, at one Mr. Semples, who keeps a very good house of entertainment."

1772 October 12
Captain Charles Edmonstone of the Eighteenth Royal Regiment, in command at Fort Pitt, sold the installation to William Thompson and Alexander Ross for 50 pounds New York currency. Thus ended the Crown's jurisdiction over the military reservation and fort at Pittsburgh.

1773 January 0
John Ormsby was granted the right to keep the first licensed ferry across the Monongahela River.

1773 January 0
Pennsylvania obtained permission from Great Britain to garrison militia at Fort Pitt.

1774 January 6
The unsettled boundary between Pennsylvania and Virginia became hotly contested when Dr. John Connolly posted a proclamation on the walls of Fort Pitt to announce his appointment by Lord Dunmore, governor of the southern colony, as "Captain, Commandant of the Militia of Pittsburgh and its Dependencies." He ordered the people to assemble as a militia on January 25.

1774 January 24
Pennsylvania challenged Virginia's claim to Pittsburgh by arresting Dr. Connolly and removing him to Hannastown to stand trial.

1774 February 2
By promising to return in April for trial, Dr. Connolly persuaded the sheriff of Westmoreland County to release him. He then obtained a commission as justice of the peace from the court of Augusta County, Virginia, which was held to include Pittsburgh, and returned to the forks, took possession of Fort Pitt, and organized his militia.

1774 April 25
Governor Dunmore ordered all the inhabitants "to pay their quit-rents and all public dues" to officers appointed by him.

1775 February 21
Dr. Connolly changed the name of Fort Pitt to Fort Dunmore. The Augusta County Court, which had been adjourned from Staunton, Virginia, on December 6, 1774, was organized at the Fort.

1775 February 23
Jacob Bausman was licensed by the Virginia Court to keep a ferry over the Monongahela at the foot of Wood Street where John Ormsby had his establishment for the previous two years.

1775 March 0
Governor Dunmore advised Dr. Connolly to disband his militia and devote himself to winning the support of the Indians for the British cause.

1775 May 16
In a convention held at Pittsburgh, frontiersmen of the territory set up a Committee of Safety approved the action of the colonies in their revolt against the Crown, and resolved that it was the "indispensable duty of every American" to resist tyranny.

1775 July 25
Dr. Connolly left for Virginia; Pennsylvania authority prevailed generally in the Pittsburgh area.

1775 August 0
John Neville (1731-1803), with 100 militia, took possession of the fort.

1775 August 25
A band of "patriots" burned the tea stock of the merchants Joseph Symonds and John Campbell.