Hungary–Romania relations
During World War II, Hungary and Romania became allies and participated in the war against the Soviet Union. But after the coup on 23 August 1944 Romania switched sides and fought against Hungary. Consequently, Soviet and Romanian troops invaded Hungary, occupied Northern Transylvania by October 1944 and re-established the Romanian administration in the region in March 1945. The 1947 Treaty of Paris reaffirmed the borders between Romania and Hungary as originally defined in Treaty of Trianon 27 years earlier, thus confirming the return of Northern Transylvania to Romania.
Romanian Navy during World War I
The last action of the Romanian Navy during the War took place after Romania re-declared war on the Central Powers on 10 November 1918. In the early hours of 11 November, hours before the Allied Armistice with Germany was signed, the monitor "Kogălniceanu" together with the river torpedo boat "Trotușul" supported the blood-less occupation of Brăila, after the Germans retreated from the city. The Romanians captured 77 assorted German vessels abandoned in the city's port.