World War I, which lasted from 1914 to 1918, is often referred to as the "Great War" or the "War to End All Wars" due to its unprecedented scale and devastation.

The American Revolutionary War, which lasted from 1775 to 1783, was a conflict between the American colonies and Great Britain that resulted in the formation of the United States.

The French Revolution, which began in 1789, led to the overthrow of the monarchy and the establishment of the First French Republic.

The American Civil War, which lasted from 1861 to 1865, was a conflict between the Union and Confederate states in the United States.

World War II, which lasted from 1939 to 1945, was fought between the Axis powers (Germany, Italy, and Japan) and the Allied powers (Great Britain, France, the Soviet Union, and the United States).

The Soviet-Afghan War, which lasted from 1979 to 1989, was a conflict between the Soviet Union and Afghanistan.

The Chinese Revolution, which began in 1911, led to the overthrow of the Qing dynasty and the establishment of the Republic of China.

The Gulf War, which took place in 1990-1991, was a conflict between Iraq and Kuwait.

The Iranian Revolution, which began in 1978, led to the overthrow of the monarchy and the establishment of the Islamic Republic of Iran.

The Six-Day War, which took place in 1967, was a conflict between Israel and its Arab neighbors.

The Russian Revolution, which began in 1917, led to the overthrow of the Soviet Union and the formation of the Commonwealth of Independent States.

The Iraq War, which took place in 2003, was a conflict between the United States and Iraq.

The Tunisian Revolution, which began in 2010, led to the overthrow of the monarchy and the establishment of the Republic of Tunisia.

The War in Afghanistan, which began in 2001, was a conflict between the United States and Afghanistan.

The Egyptian Revolution, which began in 2011, led to the overthrow of the monarchy and the establishment of the Republic of Egypt.