Global wars are large-scale conflicts that involve multiple countries and often span across continents. These wars typically arise from political, economic, or social tensions and can lead to significant changes in international relations. Notable examples include World War I and World War II, which reshaped borders and influenced global power dynamics. During global wars, nations may form alliances to support each other, while others may remain neutral. The impact of these wars is profound, affecting millions of lives and leading to advancements in technology and military strategy. The aftermath often results in treaties and organizations, such as the United Nations, aimed at preventing future conflicts.