This is the 6970th most frequent Russian word.
армии
The Russian word "армии" is the genitive singular or nominative plural form of "армия," meaning "army" in English.
In this sentence, 'армии' is used in its instrumental case form, referring to the institution of the military service.
В армии я научился дисциплине.
In the army, I learned discipline.
Here, 'армии' is in the genitive case, indicating possession or relation to the 'museum'.
Рядом с нашим домом расположен музей армии.
Next to our house, there is a museum of the army.
In this sentence, 'армии' is in the accusative plural case, denoting the destination of the soldiers' return.