A civil war is a conflict between groups within the same country, often over political power, resources, or social issues. These wars can arise from deep-seated grievances, ethnic tensions, or ideological differences. The fighting can lead to significant loss of life, displacement of people, and destruction of infrastructure. Civil wars can vary in duration and intensity, with some lasting for years or even decades. They may involve various factions, including government forces, rebel groups, and sometimes foreign intervention. Notable examples include the American Civil War and the Syrian Civil War, both of which had profound impacts on their respective nations.