This is the 12340th most frequent Polish word.
mongolskich
"Mongolskich" means "Mongolian" (pertaining to Mongolia) in Polish, used in the plural or genitive case.
Here, 'mongolskich' is an adjective describing the wars, which are of Mongolian origin.
Historia mongolskich wojen zawsze mnie fascynowała.
The history of Mongolian wars has always fascinated me.
In this sentence, 'mongolskich' acts as an adjective qualifying the artifacts, indicating that they pertain to Mongolia or its culture.
W muzeum możemy zobaczyć wiele mongolskich artefaktów.
At the museum, we can see many Mongolian artifacts.
'Mongolskich' functions here as an adjective modifying the myths and legends, specifying their origin or subject matter as related to Mongolia.