the.com/turn of the tide

The exact moment momentum defects to the other side, quietly, before anyone cheers.

means The point at which a situation that was going one way begins reversing direction, used especially for shifts in fortune, battle, or public mood.

from Rooted literally in the sea: tides turn on a fixed schedule, the brief slack-water moment when incoming becomes outgoing or vice versa. Sailors and coastal communities watched this turn closely since it governed when ships could safely leave harbor. By the 16th–17th centuries, writers had already lifted the phrase ashore as a metaphor for any decisive reversal of fortune — in war, politics, or luck — the instant things stop flowing one way and start flowing the other, long before the change is visible to those caught in it.

literal origin
Tides actually pause briefly before reversing direction
that pause
Called slack water, nothing to do with laziness
military use
Popularized describing battles flipping from losing to winning
misconception
It is gradual, not a single dramatic instant
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