Infantry played a key role in all the battles of the First World War. This photograph shows a charge conducted by French troops in Argonne in October 1915. Soldiers are equipped with the Lebel rifle and the new Adrian helmet. They have fixed their bayonets at the very last moment in case of hand to hand combat. This offensive was intended to reduce German pressure on Russian armies in Poland. However it was conducted with ineffective artillery supports in difficult terrain and ended up being very costly with no significant results.