Explain how the persian empire was able to maintain an efficient system of communication.

The Persians built a system of well maintained roads which facilitated the rapid transit of military and government personnel. One particular road was called the Royal road that stretched from Sardis to Susa . The Persians  established way stations at intervals equipped with fresh horses for the King's messenger.

The Assyrian system of communication was so efficient  and effective that a provincial governor anywhere in the empire except Egypt could ask a question and receive an answer within a week. 

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.