Leon Trotsky was assassinated on August 21, 1940, in Coyoacán, Mexico, by Ramón Mercader, a Spanish communist and agent of the Soviet NKVD. The assassination was the culmination of Stalin's efforts to eliminate Trotsky as a political rival, ending the life of one of the most prominent figures of the Russian Revolution.

In 1938, Trotsky founded the Fourth International, an international communist organization aimed at promoting Trotskyist ideas and opposing Stalinism. The organization sought to unite revolutionary socialists worldwide and continue the struggle for socialism on a global scale.

In 1929, Trotsky was exiled from the Soviet Union, initially finding refuge in Turkey. His expulsion was a result of his continued opposition to Stalin's regime. During his exile, Trotsky continued to write and criticize Stalin, maintaining his influence among international communists.

On November 12, 1927, Trotsky was expelled from the Communist Party due to his opposition to Stalin's policies. This marked the culmination of a power struggle within the Soviet leadership, as Trotsky's ideas clashed with Stalin's vision for the future of the Soviet Union.

In 1918, Trotsky was appointed as the People's Commissar for Military and Naval Affairs, effectively becoming the Commissar of War. He was instrumental in organizing the Red Army during the Russian Civil War, demonstrating his strategic acumen and commitment to the Bolshevik cause.

Trotsky played a crucial role in the October Revolution of 1917, which led to the Bolsheviks seizing power in Russia. As the chairman of the Petrograd Soviet, he organized the insurrection that overthrew the Provisional Government, solidifying his position as a leading revolutionary figure.

During the 1905 Russian Revolution, Trotsky emerged as a key figure, becoming the chairman of the St. Petersburg Soviet. His leadership during this period demonstrated his organizational skills and his ability to inspire workers, setting the stage for his future revolutionary activities.

In 1902, Trotsky escaped from his Siberian exile using a forged passport under the name Leon Trotsky, a name he would use for the rest of his life. He made his way to London, where he joined forces with Lenin and other Russian Marxists, contributing to the revolutionary cause.

In 1898, Trotsky became involved with the Marxist movement, joining a group called the South Russian Workers' Union. His involvement in Marxist activities led to his arrest and subsequent exile to Siberia, marking the beginning of his lifelong commitment to revolutionary socialism.

Leon Trotsky was born Lev Davidovich Bronstein on November 7, 1879, in Yanovka, Ukraine, which was then part of the Russian Empire. He was born into a well-off Jewish farming family. His early life in Ukraine would later influence his political views and revolutionary activities.