The answer is
b. they were against the teachings of Jesus
The Americans whowed great distste and hatered towards Japan of which lead to the entry of the US in WW2 and the Nuclear bombing of Hiroshima.
Manifest destiny made it to where the united states and americans were trying to expand everywhere, this meant that Americans were also going into other countries land (especially Mexico's) A large group of farmers lead by John Austin made an agreement with Mexico to where they would bring mexicans amd farm Texas. They did not fully comply to all the rules in the agreement. Because the United States had land on the borders of Texas with a strong army and americans already in Texas they basically said this is our land amd started a war ending in the anexation of Texas.
The most surprising thing for me personally was the set up of the trenches, there is a very good system where the front line is the first to attack or be attacked while the others are there as backups. If someone were to get hurt within the first trench, there are easily accessible routes for the soldiers to take to retreat to safety, on the contrary, if the front lines were in need of any reinforcement whatsoever, there is a clear way to travel for the soldiers to get more ammunition or man power.
