Answer: Yorktown affected the course of the war because it was key location needed and one of the final locations held by British forces. The British commanders where at Yorktown. At the battle of Yorktown, the French trapped the British from escaping the place from sea, and the Americans managed to surround the area. This was a siege, with French grenadiers firing relentlessly upon Yorktown. therefore, when the brits surrendered, the Americans won, because the British no longer had a firm location to launch an offensive upon the colonies.
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