The roman republic and the roman empire grouped their soldiers into organized military units. this military unit was called a a. phalanx. b. horde. c. legion. d. squadron.

C. Legion is the correct answer.

Explanation:

In Ancient Rome the military was a highly organized institution with a clear cut system of rank and number of different divisions of the basic unit, the legion. The legions were numbered and each legion had 5500 men. It was further divided into six centuries of 80 men each. the century was commanded by Centurian and each century had a tesserarius, a signifier, a cornicen, and an optio. Legion also had 120 cavalrymen who were used as scouts.

the federal government of the united states was established by the constitution. us is a presidential republic. the president is head of state, head of government and of a two party legislative and electoral system. the supreme court balances the powers of the federal and the state government. yhe executive branch is headed by the oresident. there are two chambers of congress, the senate and the house of representatives. judicial power is exercised by the judicial branch (or judiciary), comprised of the supreme court and lower federal courts. the judiciary's function is to interpret the   constitution as well as the federal laws and regulations.