The Story Behind My Topic

I have always wondered what types of weapons people use in the military from the past and present.  I have read alot about how people from ancient times had wars, so i wanted to know what they used to have wars with.  Also I am taking JROTC and was wanting to get a head start and know a little bit about the military. My grandpa was also in the military and I wanted to what weapons he was assigned also. That is why i chose my topic about military weapons.