After this, Romania joined the Axis powers after territorial adjustments with Hungary and Bulgaria. This alliance would invade the Soviet Union on 22 June 1941, although Romanian military operations only began on 2 July. After a few weeks, Bessarabia and Northern Bukovina were recaptured and integrated back to Romania. Subsequently, the Transnistria Governorate would also be established, but it was never formally annexed unlike the other two regions.