The two conditions that contributed to Congress’s vote to authorize a declaration of war in 1812 are:
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British impressment of U.S. soldiers - The British practice of forcibly enlisting American sailors into the Royal Navy was a significant grievance that fueled calls for war.
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British support for Native American resistance - The British were seen as supporting Native American tribes in their efforts to resist American expansion, which was also a driving force behind the push for war.
These factors, among others, played a crucial role in the decision to go to war against Britain in 1812.