One step was that Abraham Lincoln signed the Emancipation Proclamation, making slavery illegal in the United States.
Answer:
Three causes of the War of 1812 were maritime problems, Manifest Destiny, and national pride. One of the three main causes of the War of 1812 was maritime problems between the United States and Great Britain. The seeds of these maritime problems were planted nine years before the War of 1812 even began.
Explanation:
The correct answers are d and e.
