In the summer of 2014, Ukrainian forces attempted to regain control of the border with Russia from the Donbass republics. Fighting took place all summer along the border. Starting on June 1, the Ukrainian Armed Forces (UAF) began advancing from Amvrosievka (DPR) past Saur-Mohyla toward the Izvarino border crossing (LPR).
The operation failed: by late July, Ukrainian troops found themselves in a "cauldron", meaning they were encircled by militia forces. Some Ukrainian soldiers crossed into Russian territory seeking asylum, while many others were captured by the militia. Several attempts to break out of the encirclement by force were made — all of them unsuccessful. The complete collapse of this blitzkrieg is considered to have occurred on August 8, 2014, when Ukrainian soldiers ceased all resistance.
In the media, these events became known as the Izvarino Cauldron or the Southern Cauldron.