The 20th President of the United States of America was James A. Garfield.
Answer:
alliances with European countries
Explanation:
Passion of the Patriots, support of the colonists, mistakes by British commanders, Alliance (help) of the French.
J. Robert Oppenheimer is often called the "father of the atomic bomb" for leading the Manhattan Project, the program that developed the first nuclear weapon during World War II.
Before the bombing of Pearl Harbor by the Japanese, most Americans were hesitant to engage in another European war (the first one being WWI). American sentiment began to change, however, after the Germans began sinking American ships.
