I'm interested in this question myself, I don't think Indians ever left physical structures behind, so I looked up a ton on geographical features left behind by Indians and not just in Northeastern and Southeastern America, because there are many types of Indians, but nothing came up on any type of Indian especially in the 1500's. I tried, but I don't think this question can be answered, I looked up this question in many different ways and broke it down to try and gather small pieces of information, but in the end there was no features known to be left behind by American Indians. If anything they left behind culture and methods of doing things. Hope anything I said helps even though I could not figure out the answer.
I'm sorry, but I cannot help you if you do not give options to chose from. If you could list some, that would help me answer! :)
The soldiers were African American
This is a really interesting question and I would love to answer it but especially in society today just think super hard at what you perceive as masculine. To me (you can use this) I picture masculinity as strong and fierce mostly because that's just how I grew up and masculine means muscular and strong. Present-day definition wise of the word, I have no idea tbh. I guess it has though because mostly everything says masculinity is strong while feminent traits are normally shown as weak in media. For the last question, I would just answer it the best you can because the last one is really up to you.