The Short Version
Amadeo does sit in a geographic transition zone between Cavite's coastal lowlands and its mountainous uplands, but the claim inflates this into a historically documented "logistical transition point" without adequate evidence. The most authoritative sources describe physical terrain transitions (JICA flood study) or name Tagaytay—not Amadeo—as the historical passageway (Tagaytay City Government). No credible source directly documents Amadeo as a trade, transport, or logistics hub linking these zones.