This is the 11058th most frequent Russian word.
гитлеровская
"Гитлеровская" means "Hitler's" or "relating to Hitler" in English.
The word 'гитлеровская' is used as an adjective modifying 'армия' to attribute it as related to Hitler.
Гитлеровская армия вторглась в Польшу в 1939 году.
Hitler's army invaded Poland in 1939.
Here, 'гитлеровские' describes 'идеологии', associating them with Hitler's beliefs or principles.
Эти гитлеровские идеологии были отвергнуты большинством стран.
These Hitlerian ideologies were rejected by most countries.
In this context, 'гитлеровской' characterizes 'Германии', specifying the period and government under Hitler.