'Nimitz' cleans his weapon in preparation for returning to the 'zero line' near Kupiansk, Ukraine.

Ukrainian soldiers swim in a lake near the border of Luhansk Oblast, Ukraine on a rare day off.

A cross sticks out from the rubble of a destroyed cemetary near Kupiansk, Ukraine.

Dasza, left, and Anton share a kiss behind a destroyed tank outside of Kupiansk, Ukraine.

A Russian tank sits on the side of a small village road in Kharkiv Oblast after being destroyed by Ukrainian forces.

Anton poses for a photo with a Ukrainian flag, signed by each medic who served at his stabilization point, near Kupiansk, Ukraine.

Cats sit on the doorstep of a home where they once lived with their owner prior to the full-scale invasion and occupation of Ukraine by Russian forces. The home now operates as a stabilization point for Ukrainian medical personnel.

Polish volunteer medics treat a man with severe flesh decay at a field hospital in Zaporizhzhia Oblast, Ukraine.