Four branches define the rest of the scenario. Roosevelt might keep the sighting secret and prepare an ambush. If he announced it, Tojo might order the attack onward or recall the force for tense negotiations. Imperial pressure might instead remove Tojo from office. Every branch changes if Nagumo learns that his force has been detected.
Notable Point · 53:24-57:27
Four strategic outcomes after discovery
The sighting produces four branches: secret American readiness, an acknowledged approach, Japanese withdrawal, or Tojo's removal.