Answer:
Before World War I, most Europeans had very romanticized and idealized notions about war. They believed that it was an immensely honorable and heroic endeavor, and that those who fought were incredibly brave and courageous. They also believed that war was a very clean and orderly affair, with rules of engagement that were always followed. However, the reality of combat in World War I was very different. The fighting was incredibly brutal and chaotic, and often involved close quarters combat and hand-to-hand combat. There were also very few rules of engagement, and soldiers often found themselves in situations where they had to kill or be killed. This reality was very different from the beliefs and attitudes that many Europeans had about war before fighting broke out.