Please tell me the real meaning.?

Question

Bracing for reprisals, United Nations peacekeepers and aid workers

stepped up security in Darfur and pulled out all but the most essential

civilians.

What does this ( pulled out all but the most essential civilians.) mean?

Please explain to me in more easy words.

Thank you. ^^

Answer 1

It means they made everyone come back home except for army people and civilians whose presence is vital.