When Monroe and the British signed the new treaty in December 1806, Jefferson refused to submit it to the Senate for ratification. Although the treaty called for ten more years of trade between the United States and the British Empire and gave American merchants guarantees that would have been good for business, Jefferson was unhappy that it did not end the hated British practice of impressment, and refused to give up the potential weapon of commercial warfare against Britain. The president made no attempt to obtain another treaty, and as a result, the two nations drifted from peace toward the War of 1812.