step into the breach

US /stɛp ˈɪntu ðə briːtʃ/
UK /stɛp ˈɪntu ðə briːtʃ/
"step into the breach" picture
1.

in de bres springen, een gat vullen

to take action when another person or group is unable to, or to fill a gap in a difficult situation

:
When the lead actor fell ill, his understudy had to step into the breach.
Toen de hoofdrolspeler ziek werd, moest zijn understudy in de bres springen.
The volunteers had to step into the breach when the regular staff went on strike.
De vrijwilligers moesten in de bres springen toen het vaste personeel staakte.