<span>Ed Stafford made history by being the first person to walk the entire length of the Amazon River. The journey by foot took him 860 days, beginning in April 2008 and ending in August 2010.</span>
Does this help?:)Let me know if I’m wrong
Constant invasions from barbaric, germanic tribes left tome weakened, the empire was ever growing which left it too large and difficult to defend uprising after spending so much on the military, of course Rome was heavily political and economic struggles and disputes were another factor leading to its decline
Answer:
because horses didn't exist in the americas until europe brought them over
Explanation: