This is the 2044th most frequent Russian word.
армия
The Russian word "армия" means "army" in English.
The word 'армия' is used here in the context of joining a national defense force.
Мой брат пошёл в армию после университета.
My brother went to the army after university.
Here, 'армия' metaphorically refers to a large group or multitude.
Армия новых выпусков книг привлекла множество читателей.
An army of new book releases attracted many readers.
In this usage, 'армия' refers to the collective armed forces as a single entity.