Complex sentence: At dusk the French consolidated the craters on the northern crest; near midnight some German soldiers were captured as they headed for Nauroy, who turned out to be from the tunnel garrison and disclosed the main entrance.
Split into simpler sentences: At dusk the French consolidated the craters on the northern crest. About midnight some German soldiers were captured as they headed for Nauroy, who turned out to be from the tunnel garrison and disclosed the main entrance.