When France went against Britain in war, America did not take any sides, which meant they were free to trade with either country. When France and Britain were blocking each other from trading, France would seize and search ships that were trading with Britain, and Britain would seize and search ships that traded with France.
With the lack of sailors, and the abundance of sailors deserting the British due to poor living conditions and such, the British had to take back deserted sailors and force them into the navy, as the naval war was raging on.
The Embargo Act
As more and more whites wanted to move into Ohio Valley, Native Americans got more aggravated. They had already given up millions of acres of land, and whites still wanted more. A Shawnee chief Tecumseh had enough. He decided no more whites were going to move in, and he spoke against the U.S. With the British backing the Native Americans in Canada, they began stopping the whites.
The captain of a British ship named "The Leopard' saw a trading American ship, whose name was "The Chesapeake". The captain of The Leopard demanded to search The Chesapeake for any deserted sailors from their navy. The captain of the Chesapeake declined this, and the Leopard began firing. The Leopard killed 3 sailors and injured others, and basically immobilized the Chesapeake. This infuriated a lot of America and called for punishment.
As the Chesapeake incident passed, Jefferson was just as angry as all of America. He made the Embargo Act, which prohibited any trade with any foreign country. This also included all of the countries that America has good trade with.
During Maddison's term as president, a group of congressmen named the War Hawks quickly became known. They were led by powerful people in both the west and the south. Both parts of the War Hawks wanted different things, except for one. WAR. They all wanted to expand land and other things. This group appealed to a large amount of America and quickly became hard to take down.