Treaty of Versailles carved out disproportionate shares of land between the winners.
Explanation:
The Treaty of Versailles was supposed to end the war and be on the terms that it does not make another contest arise between the powers of Europe.
However, the winners of the war carved out a huge share of the land between themselves and Russia and effectively ended the empire of Austro Hungary.
Germany also got the short end of the stick and Italy did not negotiate its position well.
This left the countries dissatisfied and germinated the seeds of another conflict that led to the second world war.