3. How did total war affect soldiers on the
battlefield?

We may think that for soldiers (of any country and any service) in WWI total war meant war 24/7. This simply mean that the soldier never really "disconnected" from the horror of the front being continuously under pressure from the traumatic experiences suffered on the front line (heavy bombing, machine gun massacres, poisonous gasses, torpedoing, snipers, filth, disease, vermin and in general...horrible misery) even if resting far from it.

It is interesting to notice the huge numbers of reported cases of shock and paranoia induced by shelling (shellshock) or fatigue that affected many soldiers (before they were treated simply as cowards but during WWI the incredible number of soldiers affected led the authorities to recognize it as a real issue and a kind of disease).

Explanation:

is there multiple

the correct answer is:   the domino theory states that if one country in a region came under the influence of communism, then the surrounding countries would follow in a domino effect.