Non-interventionism is a foreign and diplomatic policy that states that a nation should avoid alliances with other nations or avoid wars, unless it is self-defense, but still have diplomatic relations with them. In nineteenth century, the U.S. was asked by the French Emperor Napoleon II to “join in a protest to the Tsar Alexander II.”, but because of the non-interventionism policy they declined the offer, in order to defend it no matter how “straight, absolute, and peculiar as it may seem to other nations”. The main significant foreign intervention by the U.S. was at the end of the nineteenth century, between Spain and America, called the Spanish-American War, and also the Philippine–American