Conversation so far:
What was this during?
During the War of 1812, the British captured the fort in the Siege of Fort Mackinac.
What did this do for him?
The victorious British attempted to protect their prize by building Fort George on the high ground behind Fort Mackinac.
Why was this so terrible?
In 1814, the Americans and British fought a second battle on the north side of the island.

Question: What did this mean to him?
Self-contained rewrite: What did the battle fought in 1814 mean to the British