The Harlem Hellfighters were African American soldiers that spent more time in combat than any other unit. True
False

FALSE

Explanation:

During the war, the Harlem Hellfighters spent more time in continuous combat than any other American unit of its size, with 191 days in the front-line trenches. They also suffered more losses than any other American regiment, with more than 1,400 total casualties.

FALSE

Explanation:

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place