rally 'round the flag

rally 'round the flag

Support a candidate, cause, or country. The phrase was ascribed to General Andrew Jackson at the battle of New Orleans but soon came to be used in American politics for supporting a campaign. It entered the vocabulary once and for all with George F. Root’s Civil War song “The Battle Cry of Freedom”: “Rally ’round the flag, boys, Rally once again, Shouting the battle-cry of freedom.”
See also: flag, rally