This is the 4460th most frequent Russian word.
воинские
Military.
The word 'военные' here is an adjective meaning 'military' and is derived from the root referring to armed forces or war.
Военные парады проходят на главных улицах города.
Military parades are held on the main streets of the city.
The word 'военного' in this sentence is used to describe the type of officer, specifically relating to the military field.
Он выбрал карьеру военного офицера.
He chose a career as a military officer.
The word 'воинские' denotes traditions that are specifically related to warriors or military practices.