This work provides an overview of military training and activities at a base in Calais during World War I. It details the rigorous final training that soldiers undergo before joining their regiments at the front, emphasizing the importance of practical instruction from experienced veterans. The text covers various aspects of training, including trench warfare techniques, gas defense, and physical conditioning. It also highlights the challenges of transporting wounded soldiers and the methods used to ensure their care. Accompanied by photographs, the narrative captures the atmosphere of military life and the dedication of both instructors and trainees.