Mobilization: The process of preparing and organizing military forces for active duty or war. Mobilization involves gathering troops, equipment, and supplies for battle.
Ultimatum: A final demand or set of conditions presented by one party to another with the threat of severe consequences if not accepted. Ultimatums often precede declarations of war.
Neutrality: The state or policy of not taking sides or participating in wars between other nations. Some countries chose neutrality during World War I, such as Switzerland and Sweden.