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.
Horses in World War II
The Romanian cavalry was the largest mounted force amongst German's allies. Romania began the war with six brigades and reformed them into divisions in 1942. A half-hearted modernisation introduced one motorised regiment in each division; prior to deployment in Southern Russia the 7th Cavalry Division was fully motorized. Four divisions were destroyed in the Battle of Stalingrad. Two divisions were trapped in Crimea and escaped the Crimean Offensive of 1944 with a loss of all hardware.