A civil war is a conflict between groups within the same country, often fighting for control of the government or to achieve political change. These wars can arise from deep-seated issues such as ethnic tensions, economic disparities, or political disagreements. The fighting can lead to significant loss of life and destruction, affecting civilians and infrastructure. Civil wars can vary in duration and intensity, with some lasting for years or even decades. Notable examples include the American Civil War and the Spanish Civil War. The aftermath often leaves lasting impacts on the nation, including social divisions and economic challenges.