No, it is not true that the development of armies, navies, and weapons is called imperialism. This would be called "nationalism". Imperialism refers to when countries take over and dominate other countries.
It’s B ..................
Extreme pro-slavery elements objected to it because it provided a precedent by which Congress had power to regulate slavery. Abolitionists opposed it because it allowed slavery to continue to spread in some of the areas.
The allied powers used land as their mail gorund to fight on while the germans used the sea as a sneek attack bc the allied powers didn't see it coming that is how the ussr was sank bc of a surpisre attack from the Germans .