What was a result of the railroad construction shown on the map?
(1) a national market developed in the united states.
(2) silver and gold mining opportunities decreased.
(3) railroad companies gave free land to settlers.
(4) steel factories relocated from the great lakes region to the rocky mountain states.

mark other guy brainliest

the most famous of all the units fighting in cuba, the "rough riders" was the name given to the first u.s. volunteer cavalry under the leadership of theodore roosevelt. roosevelt resigned his position as assistant secretary of the navy in may 1898 to join the volunteer cavalry. the original plan for this unit called for filling it with men from the indian territory, new mexico, arizona, and oklahoma. however, once roosevelt joined the group, it quickly became the place for a mix of troops ranging from ivy league athletes to glee-club singers to texas rangers and indians.