Why did constantine move the capital of rome to constantinople?

What did the introduction of silk into the mediterranean do for the abbasid empire

What makes fort sill historically unique among other regional military installations? a. it is the site where seven major commanders of us military efforts were trained. b. it houses the largest explosive weapons factory in the united states. c. it specializes in training soldiers to preserve the cultural artifacts of nations invaded by the us military. d. it is the oldest functioning installation in oklahoma.

Compare the roles of the three countries of the central powers.