Siege of the Luhansk Border Base
2014 CE.
Shown on the map at 48.583°, 39.333°.
The siege of the Luhansk border base was a two-day-long standoff at a Ukrainian border base located on the outskirts of Luhansk city, from 2 to 4 June 2014.
Text from the Wikipedia article Siege of the Luhansk border base, licensed CC BY-SA 4.0.