Exploring Ukraine's Deadliest Battle in Bakhmut Trenches.

Trench warfare has been a major element of fighting between Ukraine and Russia around the eastern city of Bakhmut. Photographs from the area show elaborate networks of trenches that slice through the earth. Soldiers endure harsh conditions and the constant threat of artillery and gunfire, sometimes only a short distance away from the enemy. This is what life looks like in Ukraine's front-line fortifications.