What does "assembly" mean in a military context?

[Punchinello]

What does the word "assembly" refer to in a military context? What noun and verb should I use for the action of soldiers(like in a camp) gathering together for example for an emergency? Thank you very much!

 

[konungursvia]

Assembly means coming together in one place. The verb is often "fall in."

 

[Punchinello]

Thank you. Can I say "emergency assemblies"?