Effects of war are widespread and can be long term or short term. Soldiers experience war differently than civilians, although both suffer in times of war, and women and children suffer unspeakable atrocities in particular. In the past decade, up to two million of those killed in armed conflicts were children. The widespread trauma due to the atrocities and suffering of the civilian population is another legacy of these conflicts, the following creates extensive emotional and psychological stress. Present-day internal wars generally take a larger toll on civilians than state wars. This is due to the increasing trend where combatants have made targeting civilians a strategic objective. In state conflict is an armed conflict that occurs with the use of armed force between two parties, of which one is the government of a state. "The three problems posed by intra‐state conflict are the willingness of UN members, particularly the strongest member, to intervene; the structural ability of the UN to respond; and whether the traditional principles of peacekeeping should be applied to intra‐state conflict". Effects of war also include mass destruction of cities and have long lasting effects on a country's economy. Armed conflict have important indirect negative consequences on, infrastructure, public health provision, and social order. These indirect consequences are often overlooked and underappreciated.
Armed conflict is not clearly defined internationally. According to the Geneva Conventions of 1949, common article 2 states that "all cases of declared war or of any armed conflict that may arise between two or more high contracting parties, even if the state of war is not recognized, the convention shall also apply to all cases of partial or total occupation of the territory of a high contracting party even if the said occupation meets with no armed resistance".International humanitarian law works to protect the rights and dignity of civilians during peace and armed conflict with parties of the conflict having legally binding obligations concerning the rights of persons not involved in the conflict. Current day conflicts continue to occur with breaches of human rights and destruction of property continuing to happen due to state interests.
The economy may suffer devastating impacts during and after a time of war. According to Shank, "negative unintended consequences occur either concurrently with the war or develop as residual effects afterwards thereby impeding the economy over the longer term". In 2012 the economic impact of war and violence was estimated to be eleven percent of gross world product (GWP) or 9.46 trillion dollars. Everyday activities of a community or country are disrupted and property may be damaged. When people become misplaced, they cannot continue to work or keep their businesses open, causing damages to the economy of countries involved. A government may decide to direct money to fund war efforts, leaving other institutions with little or no available budget.