One of the major accomplishments of the Roman Empire was a system of r_ _ _ _ which helped with c _ m m _ _ _ c _ t _ _ n and t _ _ _ e.

One of the major accomplishments of the Roman Empire was a system of ROADS which helped with COMMUNICATION and TRAVEL.

Explanation:

gold discovery in california, and pioneer settlers were sometimes pulled west because they wanted to make a better living. others received letters from friends or family members who had moved west. these letters often told about a good life on the frontier. the biggest factor that pulled pioneers west was the opportunity to buy land.

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