World War 1 in Europe would have been vastly different without the technological advancements developed around the time of the war. Prior to the war, military technology was still based on 19th century designs, which were quickly rendered obsolete by the new methods of warfare that emerged during World War 1.
For example, without the development of machine guns, trenches might not have been as effective as a defensive strategy, and the war may have been fought differently with different strategies and tactics. Without advancements in chemical warfare, the use of poison gas would not have been possible and the tactics of warfare would not have included gas masks and other protective gear. Similarly, the use of tanks, airplanes, and submarines allowed for new strategies and tactics, which would not have been possible without these technological advancements.
Without these technological advancements, the war may have been fought in a more traditional way, with cavalry charges, infantry assaults, and the use of older weaponry such as cannons and rifles. This would have led to more casualties and longer periods of fighting, as neither side would have had a significant advantage in terms of firepower or mobility.
Overall, the technological advancements of World War 1 had a profound impact on the way the war was fought and the strategies that were employed. Without these advancements, the war would have been fought in a different way, with different outcomes and potentially longer periods of fighting.