call up
US /kɔːl ˈʌp/
UK /kɔːl ˈʌp/

1.
2.
llamar a filas, reclutar
to summon someone for military service
:
•
During the war, many young men were called up for duty.
Durante la guerra, muchos jóvenes fueron llamados a filas.
•
He was surprised when he received the letter to call him up.
Se sorprendió cuando recibió la carta para llamarlo a filas.