Answer:
The answer should be: Companies replaced hand-operated brakes with air brakes on trains.
Explanation:
You have to think how hard it was for trains to stop with hand operated brakes. Trains go fast, and not stopping in time can be dangerous. Hope this helped :)
The Incan civil war weakened the empire exhausting its resources and killing its fighters, thus leaving the door open to conquest by the Spanish
With their far greater numbers, they might have repelled the European forces meaning that they could have retained control of the continent
Answer: cities were destroyed, gold was taken, civilization was just about gone, so since those occurred not much more than archeologist produce this fact
Explanation:
Answer:
They aided the colonist fight Great Britain
Explanation:
They fought in the Battle of Yorktown
