Because you could just sit in your trench and wait for the opponent to attack, at which point you could shoot him, throw explosive devices, or even use chemical weapons that weren't banned then.
It strengthened the nations who were opposed to Soviet Expansion
Atleast that makes the most sense,
But the last option is kinda the same
Answer:
I'm guessing it's the last option
Explanation:
Process of elimination, also that's just how things were
Farmers sowed and harvested crops around flooding season, because the flooding gave them fertile soil.
:)
