Source A: Excerpt from a military report, 1916

'The introduction of new weaponry such as machine guns, poison gas, and artillery have transformed the battlefield, making advances extremely difficult and deadly.' Provenance: Official military report from the British Army, 1916.

Source B: Extract from a soldier's diary, 1917

'We faced relentless artillery bombardments and had to contend with the new threat of gas attacks. The machine guns kept us on the defensive, while grenades and bayonets were used in close combat.' Provenance: Personal diary of a British soldier, 1917.

Source C: Historian’s view

'The development of automatic weapons and chemical agents drastically changed the nature of warfare, making it more deadly and static.' Provenance: Modern history analysis by Dr. Jane Doe.

The development and use of various weapons during trench warfare greatly affected how battles were fought and the experiences of soldiers. These weapons increased the deadliness of warfare and contributed to the stalemate on the Western Front.