From Wiktionary, the free dictionary
а́рмии • (ármii)
- indefinite plural of а́рмия (ármija)
а́рмии • (ármii) f inan or f inan pl
- inflection of а́рмия (ármija):
- genitive/dative/prepositional singular
- nominative/accusative plural
- Not to be confused with а́рмий (ármij) that has й (j) at the very end instead of и (i).