Final answer:
The treaties ending the First World War led to the dismantling of empires, application of national self-determination, and revolutionary changes in Russia.
Explanation:
The major consequences of the treaties that ended the First World War included:
- The dismantling of empires in central, eastern, and southeastern Europe leading to the creation of numerous unstable states.
- European powers applying the principle of national self-determination to their colonies.
- The overthrow of the Romanov dynasty in Russia, the emergence of the Bolsheviks, and the collapse of the Tsarist state.
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