Well in the case of the Mongols for example, being nomadic meant that their armies were highly mobile and adaptable. Conquests and long distance travel to conquer a civilization wasn't as difficult because it suited their nomadic lifestyle. They often adapted certain military technologies from the civilizations they conquered as well.
Number 12 is C and D
Number 13 is Vietnam
Number 15 is Korea
Number 16 is the fall of the Berlin wall
Number 17 is D
Answer:
hi from which country are you
Well they were very innovative but are now mostly obsolete
