Hertza region
In the secret protocol attached to the 1939 Molotov–Ribbentrop Pact defining the division of the spheres of influence in Eastern Europe, Nazi Germany declared it had no political interest in Bessarabia, in response to the Soviet Union's expression of interest, thereby consigning Bessarabia to the Soviet "sphere". On June 26, 1940 the Soviet government issued an ultimatum to the Romanian minister in Moscow, demanding Romania immediately cede Bessarabia and Northern Bukovina. Italy and Germany, which needed a stable Romania and access to its oil fields, urged King Carol II to do so. On June 28, Soviet troops crossed the Dniester and occupied Bessarabia, Northern Bukovina, and the Hertza region.