In the early part of the eighteenth century, the trans-Appalachian region of North America remained much as it had been for the preceding centuries. Some trappers and backwoodsmen?Frenchmen from Canada and Englishmen from the British colonies?traveled through its woods and rivers, but the principal occupants of the region were Native Americans and a great diversity of wildlife. As the British colonies became more populated and prosperous, their citizens began to look towards the rich lands across the Appalachian mountains as providing new opportunities for settlement and economic growth. The French, who claimed the entire watersheds of the Mississippi and St. Lawrence Rivers?which included the Great Lakes and the Ohio River valley?became worried about British encroachments into this region and so they moved to set up a series of forts, including at Crown Point on Lake Champlain, and on the Wabash, Ohio, Mississippi and Missouri Rivers. The British, meanwhile, built their own forts at Oswego and Halifax, the government granted lands in the Ohio Valley to the Ohio Company and adventurous traders set up bases in the region.
In 1750, British and French representatives met in Paris to try to solve these territorial disputes, but no progress was made. In 1752, the Marquis Duquesne was made governor-general of New France with specific instructions to take possession of the Ohio Valley, removing all British presence from the area.. The following year, he sent troops to western Pennsylvania where they built forts at Presque Island (Erie) and on the Rivi?re aux Boeufs (Waterford). At the same time, Robert Dinwiddie, Lieutenant Governor of Virginia, was granting land in the Ohio Valley to citizens of his colony, setting in motion the events which inevitably led to the French & Indian War.

Dinwiddie, hearing of new French forts on the upper Allegheny River, sent out a young Virginia officer, George Washington, to deliver a letter demanding that the French leave the region. This mission was, not surprisingly, a failure, but when passing through the region where the Allegheny and the Monongahela form the Ohio, Washington noted that the point of land at the junction was an excellent spot for a fort. In early 1754, in response to Washington's suggestion, the British started to build a fort there, Fort Prince George, but French troops soon arrived and threw them out. The French completed the fortification, renaming it Fort Duquesne. Washington, meanwhile, had been sent out with a contingent of troops to help establish British control in the west, and when he heard of the surrender of Fort Prince George, he set up camp in Great Meadows, southeast of Fort Duquesne. Washington received a report that a nearby French contingent intended to attack, so he launched a preemptive strike against the French camp. This was the first engagement of the yet undeclared French & Indian War. Though Washington won that engagement, he was soon defeated by a superior force sent out from Fort Duquesne, leaving the French in command of the entire region west of the Allegheny Mountains.

Early the next year, 1755, Major General Edward Braddock was sent to America as commander-in-chief of the British forces in America. He quickly set in motion plans to capture Fort Duquesne, leading his troops west from Virginia in June. Meeting the French 10 miles east of Fort Duquesne, the British were defeated with heavy losses, including Braddock who died four days after the battle. Once again the French had maintained their grip on the Ohio Valley. In the north, British luck was better, for they won a battle on Lake George and established two forts just south of the French fortification (Fort Frederick) at Crown Point on Lake Champlain. These were Fort Edward on the Hudson River and Fort William Henry at the southern end of Lake George.

Despite all this military activity, it wasn't until 1756 that war was officially declared between the French and British. The military activity that year and the following was relatively inconclusive, though the French generally had the upper hand, capturing Fort Oswego on Lake Ontario and Fort William Henry. In 1758 the tide began to turn and the British started to take the upper hand. They launched a three part attack on the French, against Louisbourg on the Atlantic Coast, Fort Carillon (Ticonderoga) on Lake Champlain, and Fort Frontenac at the eastern end of Lake Ontario. That summer the British finally captured the city of Louisbourg,