World War II: start of the First Battle of El Alamein.

World War II or the Second World War was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all of the world's countries participated, with many nations mobilising all resources in pursuit of total war. Tanks and aircraft played major roles, enabling the strategic bombing of cities and delivery of the first and only nuclear weapons ever used in war. World War II is the deadliest conflict in history, causing the death of 70 to 85 million people, more than half of whom were civilians. Millions died in genocides, including the Holocaust, and by massacres, starvation, and disease. After the Allied victory, Germany, Austria, Japan, and Korea were occupied, and German and Japanese leaders were tried for war crimes.

The First Battle of El Alamein was a battle of the Western Desert campaign of World War II, fought in Egypt between Axis forces of the Panzer Army Africa—which included the Afrika Korps under Field Marshal Erwin Rommel—and Allied forces of the Eighth Army under General Claude Auchinleck.