Major Thayer evacuated the fort with a degree of firmness equal to the bravery of his defense. He set fire to the remains, and with less than 200 men, having carried off all the wounded, he arrived at Fort Mercer about 1 o’clock in the morning, being the last man to march out of the fort.
The British took possession of Fort Mifflin half an hour after the Americans left it.
Colonel William Plunket Defeats Yankees
in Pennamite War, September 28, 1775
There had been four years of tranquil enjoyment among the Yankee settlers at Wyoming following the conclusion, in 1771, of the first Pennamite War. The Proprietaries had been defeated and driven out, and for four years they made no attempt to retake their property.
With the defeat of Dick and Ogden, August, 1771, the Penns were actually driven out of Wyoming and the Yankee settlers poured into the valley in such numbers that it was considered advisable to erect five new townships, each five miles square, along the West Branch of the Susquehanna River, on the lands of the Susquehanna Company.
Accordingly, in 1771 the township of Charlestown was erected at the mouth of Muncy Creek, now Lycoming County; the township of Judea was erected above the mouth of Limestone Run, which is in the center of the present borough of Milton.
In May, 1773, the township of Westminster was erected above the mouth of Buffalo Creek, in what is now Union County.
It was intended that another township, to be called New Simsburg, should be erected on the south side of the West Branch, opposite the mouth of Pine Creek. This survey was never made, but the site selected was opposite the present borough of Jersey Shore, and included the beautiful island at that place.