Answer:
I can't explain the first but the second yes...
Step-by-step explanation:
Changes of war within the great war was
1. The times of marching side by side is over, if they do that, the men will be slaughtered in droves. The machine guns such as the Maxim, the Vickers, and a myriad of others would devastate entire battle groups
2. The advent of trench warfare was enabled. It was a brutal war of attrition, no more "single-battle victories" it was going to be even longer. This was no glorious adventure. This was a death warrant.
3. The Great war also introduced air warfare, tales of the brave cool as ice pilots like Baron von Richtofen. It started as scouting missions reallu. Until the Germans came up with the "Fokker" a uni-plane capable of shooting down hostile planes. Then it escalated more and more and more. Then evolved into the legendary air-battles that we see in some movies today.