Harriet Tubman helped the union army because she had inside information.
The terrain is one thing they study, for example, if it is woody, or a plain, or rocky, or if it has mountains, etc.
they also study the plants, animals, etc and how they survive in the conditions
hope this helps
The technology that was ignored prior to the attack on the
Pearl Harbor was the radar. The reason that it was ignored during the attack
because of the fact that it wasn’t new or evolved and that it is still
considered to be experimental.
