They 'raised the white flag' [=admitted defeat] soon after the election results came in.
The 'flag' was flying [=the flag was raised up on a pole] over the fort.
Gaps in your employment history are 'red flags' to employers.
(..) We've just been attacked. The world thinks it can test us right now, and a full, swift show of force is the only way to remind them that our flag is still flying strong tonight. And all I'm saying is that I think there are different ways to show force. What you need to (..)2016 TvShow: Designated Survivor Title: Pilot Season: 1 Episode 1