I got a question for you: The War of 1812 (1812 -- 1815) was a conflict fought between the United States, the United Kingdom, and their respective allies. Historians in Britain often see it as a minor theatre of the Napoleonic Wars; in the United States and Canada, it is seen as a war in its own right.

Based on this passage, who did us fight in war of 1812?
Let's think first:
The relevant information to answer the above question is: The War of 1812 (1812 -- 1815) was a conflict fought between the United States, the United Kingdom, and their respective allies.
Therefore, the answer is between the United States , the United Kingdom , and their respective allies.