The French and the English were going to war after the death of Jumonvillie which Washington was accused of.
Some of the most powerful Native American tribes offered to help the British since they would be the most likely to win. However, the British declined them in a way to make it seem like they are animals.
Angry the Native Americans went to the French to tell them that they will become allies with them fighting the British. Of course the French accepted so the alliance was made.
The war started and the British out numbered the French. For a while, they just start shooting at each other until someone gets shot. Out of a lucky shot they shoot the general of French. The French panicked getting ready to surrender when they heard drum war sounds from the distance.
Then the Native Americans start coming out of the other side of the forests taking British soldiers one by one and cutting their heads off pinning them to the trees.