He attempted to more westernise the economy with his "Four Modernizations" <span />
Japan surprised attacked Pearl Harbor, destroying most of the US's Pacific Fleet (but missing the carriers that were out on a manuovre), even while the Japanese diplomat was talking of peace.
Later on, Japan also took over US colonies, such as Wake Island, Phillipines, etc.
hope this helps
The end and outcome of the Mexican-American War. The United States won, taking many new territories that needed to be divided into slave states and free states. The compromise of 1850 attempted to keep the peace between the slave states vs the free state balance.