What two benefits do we get when we preserve the customs
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A custom (also called a tradition) is a common way of doing things. It is something that many people do, and have done for a long time. Usually, the people come from the same country, culture, or religion. ... Many customs are things that people do that are handed down from the past.

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