The following outline is provided as an overview of and topical guide to war:
War – organised and often prolonged armed conflict that is carried out by states or non-state actors – is characterised by extreme violence, social disruption, and economic destruction.War should be understood as an actual, intentional and widespread armed conflict between political communities, and therefore is defined as a form of political violence or intervention.
Warfare – refers to the common activities and characteristics of types of war, or of wars in general.
A cold war is a state of conflict between nations that does not involve direct military action but is pursued primarily through economic and political actions, propaganda, acts of espionage or proxy wars waged by surrogates. This term is most commonly used to refer to the Soviet–American Cold War of 1947–1991. The surrogates are typically states that are satellites of the conflicting nations, i.e., nations allied to them or under their political influence. Opponents in a cold war will often provide economic or military aid, such as weapons, tactical support or military advisors, to lesser nations involved in conflicts with the opposing country.
An invasion is a military offensive in which large numbers of combatants of one geopolitical entity aggressively enter territory owned by another such entity, generally with the objective of either conquering; liberating or re-establishing control or authority over a territory; forcing the partition of a country; altering the established government or gaining concessions from said government; or a combination thereof. An invasion can be the cause of a war, be a part of a larger strategy to end a war, or it can constitute an entire war in itself. Due to the large scale of the operations associated with invasions, they are usually strategic in planning and execution.
Colonial war (in some contexts referred to as small war) is a blanket term relating to the various conflicts that arose as the result of overseas territories being settled by foreign powers creating a colony. The term especially refers to wars fought during the nineteenth century between European armies in Africa and Asia.
A proxy war is an armed conflict between two states or non-state actors which act on the instigation or on behalf of other parties that are not directly involved in the hostilities. In order for a conflict to be considered a proxy war, there must be a direct, long-term relationship between external actors and the belligerents involved. The aforementioned relationship usually takes the form of funding, military training, arms, or other forms of material assistance which assist a belligerent party in sustaining its war effort.
