Considering this issue when looking at Manifest Destiny and Westward expansion, how often was force or the threat of force used to gain desired territory? Does this make the acquisition of the territory unjustified? Why/Why not?

When gandhi reached the arabian sea at the end of the salt march, he picked up raw salt from the water and made a declaration: “with this, i am shaking the foundations of the british empire.” how do you think this quotation is symbolic of gandhi’s works and philosophy?