Answer:
Nepal's terrain is unique because it is consisted of flat river plains and many hills and mountain. One example is the rugged Himalayas in north.
As the war dragged on, the unions advantages in factories, railroads, and man power out the confederacy at a great disadvantage
I believe the correct answer would be that the Incan army traveled through canals.
Hope it helps!
South Sakhalin (prewar-1945)