how would you verify whether a silk dress both by your mother is made from pure silk and artificial one...

Silk can be identified by touching as rubbing silk can make you feel warm, unlike other synthetic replacements. You can pass a silk saree through a ring if it is of high quality. ... Nowadays pure silk comes with silk mark as a proof of its authenticity

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