What non-European civilizations are included in ancient "Western Civilizations" —

Turkey and possibly US

Explanation:

turkey expanded into europe, but its homeland is in asia

US might be an answer due to being western but it isn't ancient

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