An amendment is a small change or addition to the constitution
The 14th Amendment would be the answer
The varying cultures collectively called Mound Builders were inhabitants of North America who, during a 5,000-year period, constructed various styles of earthen mounds for religious and ceremonial, burial, and elite residential purposes.
The main tactic the Persians uses was fighting. Now, i'm NOT saying they were good fighters. However, they did have a bigger number of people to fight for them while all around the empires had so little people to fight for them. Hope this helps :)