Is Armies a Plural Noun?

Armies are the plural form of army.

What is army plural form?

noun. ar·​my | \ ˈär-mē \ plural armies.

Is it armies or army's?

Within a national military force, the word army may also mean a field army. In some countries, such as France and China, the term "army", especially in its plural form "armies", has the broader meaning of armed forces as a whole, while retaining the colloquial sense of land forces.