What factors led to the decline of the byzantine empire and the fall of constantinople?

Mehmed the conquer was an ottoman emperor that captured contantinople and there was never a roman empire again. Besides from that there were constant civil wars and crusaders due to the fact that constainople was a sucessful land but with every conquest it was more weakend

china has confucianism thats everywhere in asia but it isn't really a religion.  

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.