Earlier this month, a number of pro-Russia checkpoints around the Donetsk region were taken by Ukrainian forces, in an attempt to encircle the city of Sloviansk, a stronghold for the pro-Russia insurgents. Here, VICE News reporter Simon Ostrovsky embeds at one of the checkpoints with the Ukrainian National Guard, a volunteer militia made up of people who were protesting at the Kiev Maidan just a few short, but eventful, months ago. Simon spent the night in the dark basement of a police station with some of the men, as heavy fire and fighting rumbled above them.