A historian using the historical thinking skill of chronological thinking might put evens that took place in history in "chronological order" in the hopes of understanding why certain events took place after others. This helps the historian determine "cause and effect".
Mean* A chain of oppression is a long chain made out of a material called oppression. I think...
Candragupta Mauryan I think hope I helped
It helped open up China for trade with all sorts of different countries because their borders were currently closed to trade before the opium wars.