Turn the tide
Meaning
Reverse the direction of events.
Usage
Used when shifts produce new momentum.
Origin & History
Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.
Naval imagery where tides turn and change currents.
Used in weather reports and war accounts since the 19th century.