The Battle of Diamond Rock and the British invasions of the Río de la Plata provide nearby comparisons. The Río de la Plata campaigns, in particular, show the risks of depending on surprise. Tactical surprise works best against an opponent who is distracted, disorganized, or unprepared. An alert force with clear missions and personnel already in position can absorb the shock and respond. Strategic deception differs because it persuades the enemy to concentrate strength elsewhere. The attacker can then land with overwhelming local numbers even when the troops at the true objective remain alert. At San Juan, Britain depended on surprise to compensate for the defenders already present, making the operation fragile from the outset.
Notable Point · 39:07-41:41
Surprise depends on local superiority
The San Juan failure shows that tactical surprise is fragile against an alert defender; strategic deception creates local superiority by drawing strength elsewhere.