By the 13th century, the was the largest land empire at that point.

By the 13th century, the Mongol empire was the largest land empire at that point.

which time period is this? or is this story fictional, i'm going to need more info to answer this question

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.