Why did Americans ultimately decide to declare war on Britain in 1812?

A) Protect the Indians from British influence
B) Show the world they could defend themselves
C) Gain control of the British West Indies
D) Help the French gain European dominance

War on Britain

is a broad term that could refer to various conflicts involving Britain, but without a specific context, it is too vague to accurately define.

War of 1812

A military conflict fought between the United States and Great Britain from 1812 to 1815, largely over issues of trade and impressment.