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.
Henri Stahl
Stahl was drafted into the Romanian Land Forces in 1916, when Romania entered World War I as an enemy of Austria-Hungary. He was a reserve lieutenant in the 6th (Mihai Viteazu) Regiment. He saw action during the early stages of the Romanian Campaign, but was badly wounded in the trenches during the battles of September 1916. Losing consciousness, he was dragged away and rescued by his peasant batman, and was under treatment at Gerota hospital when Iorga dedicated him an encomium in "Neamul Românesc" (September 23, 1916). He was a convalescent in Ploiești when the Central Powers occupied southern Romania.