What historical events, processes, or developments contributed to the rise of the Mongol empire/khanates?

The Mongol Empire expanded through brutal raids and invasions, but also established routes of trade and technology between East and West.

cherokee and arikara

the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.