strike one's flag

verb2

1. •
   To take down one's national or other representative flag in order to indicate surrender.

   • An Austro-Prussian army of 120.000 men . . . is of itself so imposing a spectacle that one is tempted to believe the little Kingdom of Denmark will strike its flag without firing a shot. — 1864
2. •
   To yield, give up, or surrender.

   • The point of this exercise wouldn't be to cause one side of the argument to see that the other is correct and strike their flag. — 2014