Which war had the most deaths?

As an expert in military history, I can provide an informed response to your question about which war had the most deaths. The human cost of war is a tragic and complex subject, and it's important to approach this topic with sensitivity and respect for the lives lost. World War II stands out as the most devastating conflict in terms of the number of deaths. It lasted from 1939 to 1945 and was a global war that involved most of the world's nations, including all of the great powers, organized into two opposing military alliances: the Allies and the Axis. The total number of fatalities from World War II is estimated to be 56.4 million. This staggering figure includes both military personnel and civilians from all countries involved in the conflict. It's a number that reflects the scale of the war and the widespread destruction it caused. Within this total, the Soviet Union suffered the most significant losses, with an estimated 26.6 million fatalities. This includes both military and civilian deaths and represents a profound loss for the nation. The impact of these losses was felt for generations and is still remembered in the collective memory of the Russian people. China also experienced a tremendous loss of life, with an estimated 7.8 million civilian deaths. The conflict in China was particularly brutal, with widespread violence and suffering inflicted upon the civilian population by various parties involved in the conflict. It's important to note that these figures are estimates. The actual number of deaths may never be known with absolute certainty due to the vast scope of the conflict, the destruction of records, and the passage of time. However, the consensus among historians is that World War II was the deadliest conflict in human history. The aftermath of World War II had a profound impact on the world. It led to significant geopolitical changes, including the beginning of the Cold War, a period of tension and competition between the United States and the Soviet Union. The war also resulted in the establishment of the United Nations, an international organization dedicated to promoting peace, security, and cooperation among nations. In conclusion, while all wars result in a tragic loss of life, World War II is widely recognized as the conflict with the most deaths in human history. It's a reminder of the devastating consequences of war and the importance of striving for peace and understanding among nations.

By far the most costly war in terms of human life was World War II (1939-C45), in which the total number of fatalities, including battle deaths and civilians of all countries, is estimated to have been 56.4 million, assuming 26.6 million Soviet fatalities and 7.8 million Chinese civilians were killed.