Definition: This is the name given to a region of dense vegetation, tree growth, and precipitation, usually found in tropical regions of South America, Africa, and Asia.

Example: Deforestation
Term: (what is the term?)

Is think it's the Rain-forest  region?

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