They didn't have the military power to defend themselves.
A. To provide aid to countries, especially in Western European countries, to keep them from becoming communist.
The answer would be Treaty of San Lorenzo
Pinckney's Treaty, also commonly known as the Treaty of San Lorenzo or the Treaty of Madrid, was signed in San Lorenzo de El Escorial on October 27, 1795 and established intentions of friendship between the United States and Spain.
President Woodrow Wilson, on behalf of the United States of America, was reluctant to enter WW1 and declare war on Germany. America wanted to remain neutral and out of the affairs of Europe. However, on May 7, 1915, Germany sunk a British ship that held more than 100 American passengers. Wilson tried to negotiate and after several failed compromises felt obligated to declare war on Germany.
