The 21st century has seen some of the most devastating and destructive conflicts in modern history, including the ongoing Russia-Ukraine war, the Israeli-Hamas conflict, and the brutal Syrian Civil War. These wars, and several others like them this century, have caused millions of deaths, widespread displacement, and profound social and economic upheaval. As global powers and regional actors continue to battle over resources, ideologies, and territorial control, civilians bear the brunt of the violence.
Click on to explore the deadliest wars of the century.