Andriy Dubchak is one of the only photojournalists to have covered the conflict in eastern Ukraine from its beginning. In this article, he shares deeply personal memories from the front lines. “His name was Eduard Yuriyevich Fedorov, a Ukrainian marine. I took this photo in March 2018 as he escorted me from a frontline position near Mariupol. He said, ‘Give me a couple of photos, as mementos.’ On June 27 he was hit by an enemy bullet. For five days,…