What does the Justice Department do to help out the business world?

The Department of Justice sales include the National Sellers List, offering property for sale to the public and the UNICOR Sales Catalog, offering goods and services for sale to the Federal Government

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.