Collective Security: Collective security is an approach where multiple nations commit to collectively defend each other against external threats. It aims to maintain peace by deterring potential aggressors through the strength of the collective alliance.
Military Alliance: A military alliance is a type of international alliance specifically focused on defense cooperation among member states, often involving military support and joint planning for their common security.
Economic Union: An economic union refers to an international alliance that focuses primarily on economic integration among member countries. It involves free trade, common market policies, and coordination of economic policies.