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. Asymmetric warfare Expeditionary warfare Expeditionary maneuver warfare Defensive warfare Offensive warfare Generations of warfare Champion warfare Underwater warfare History of war See: Warfare by era List of wars by death toll Category:Lists of wars by region Category:Warfare by type Lists of battles List of battles by casualties List of orders of battle List of sieges Military theory Philosophy of war Principles of war War cycles Military organization Operational level of war Blitzkrieg Soviet deep battle Maneuver warfare Operational manoeuvre group List of military operations Military operation plan Military operations other than war Types of military operations, by scope: Theater – operation over a large, often continental area of operation and represents a strategic national commitment to the conflict such as Operation Barbarossa, with general goals that encompass areas of consideration outside of the military such as the economic and political impacts. Campaign – subset of the theatre operation, or a more limited geographic and operational strategic commitment such as Battle of Britain, and need not represent total national commitment to a conflict, or have broader goals outside of the military impacts. Battle – subset of a campaign that will have specific military goals and geographic objectives, as well as clearly defined use of forces such as the Battle of Gallipoli, which operationally was a combined arms operation originally known as the "Dardanelles landings" as part of the Dardanelles Campaign, where about 480,000 Allied troops took part.