Hungarian-Romanian War

The Hungarian-Romanian War was an ideological conflict in the Eastern Balkans.

Events
In the aftermath of World War I, the borders of  Kingdom of Romaniaball were uncertain and Kingdom of Romaniaball passes up to Tisa, but Georges Clemenceau (prime-minister of  Franceball) was against it. After some discussion Georges Clemenceau agrees and First Hungarian Republicball is asked to accept the new borders of  Kingdom of Romaniaball. However,  First Hungarian Republicball would not accept this ultimatum and his government resigned as an act of protest.

The next day, promising lost clay back the communist party takes the power, turning into Hungarian Soviet Republicball, and attacks  Kingdom of Romaniaball to take back  Transylvaniaball. Starting the Hungarian-Romanian War. Initially, the attack was successful as Kingdom of Romaniaball was taken by surprise, but the next day  Kingdom of Romaniaball counter-attacks on the whole Romanian-Hungarian border, took back all the lost clay, and stopped again at Tisa river.

Hungarian Soviet Republicball decides to attack Czechoslovakiaball instead, they are winning and  Franceball promises that if  Hungarian Soviet Republicball will retreat from  Czechoslovakiaball they will give them back the clay from Tisa to the current borders. Hungarian Soviet Republicball accepts and retreats from Czechoslovakiaball, when  Franceball asks  Kingdom of Romaniaball to retreat also to their new borders,  Kingdom of Romaniaball replied that he would comply only after the  Hungarian Soviet Republicball army would have demobilized.

Upon hearing the Kingdom of Romaniaball demands,  Hungarian Soviet Republicball answered that from now on he would rely solely on the might of his army and attacked  Kingdom of Romaniaball. Eventually,  Kingdom of Romaniaball won, occupied Budapest, removed the communist party, kept Transylvaniaball, and looted Second Hungarian Republicball. Under pressures of Franceball,  Kingdom of Romaniaball gave  Second Hungarian Republicball the clay from the Tisa river to the current borders back. In 1920 Kingdom of Romaniaball left  Second Hungarian Republicball's clay.

After Kingdom of Hungaryball's defeat, the Treaty of Trianon was signed by  Kingdom of Hungaryball and the Allied Powers (16 countries) where  Kingdom of Hungaryball officially accepted the loss of the lands. As they signed no peace treaty before, Trianon marked the end of World War I between Kingdom of Hungaryball and the Allied Powers. Being officially a defeated state in World War I Kingdom of Hungaryball had no words to say in the Treaty of Trianon, the terms were just imposed on them. Kingdom of Hungaryball claims Trianon is injustice. Kingdom of Romaniaball claims Trianon is justice. From then on the Treaty of Trianon became a central element in Hungarian nationalism.

After Trianon in 1920, Czechoslovakiaball, with  Kingdom of Romaniaball and  Yugoslaviaball formed the Little Entente with support from  Franceball to ensure that  Kingdom of Hungaryball will not attempt to recover lost clay again. The alliance broke in 1938 after the Nazi invasion of Czechoslovakia.