The Pullman strike was caused by the panic of 1893, George Pullman, which increased hours for working and they cut down wages.
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Joseph Stalin wanted to regain Russia's (USSR) land that was lost in the previous World War I, (The Great War) basically wanted to take over the world, little by little. To do this, he eliminated anyone who he thought would be more powerful than him, such as the important rulers in the Central Planning Committee.
That the more extreme Muslim Shiites did not support the pro-U. shah of Iran. It also represented Carter’s ultimate failure to broker and sustain peace in the Middle East.