The Invasion Scenario: How the PLA Plans to Cross 110 Miles of Water
The People’s Liberation Army has been studying the problem of amphibious assault on Taiwan for longer than most of its current officer corps has been alive. The scenario has driven force development decisions, procurement priorities, and joint operations doctrine across three decades of modernization. What the PLA has built is not a military designed to fight a generic adversary in generic conditions. It is a military designed, among other things, to cross 110 miles of water against a prepared defender while managing American intervention. Understanding what that military looks like is the starting point for any serious assessment of Taiwan Strait risk.
The physical problem is severe. The Taiwan Strait is not the English Channel, which is 21 miles at its narrowest. It is five times wider, with currents, weather patterns, and sea states that complicate amphibious operations during most of the year. The seasonal window for large-scale amphibious assault is constrained by the northeast monsoon, which creates rough seas from October through March, and by the southwest monsoon, which creates different but still challenging conditions from June through September. The traditional assessment identifies April-May and October as the most favorable windows, though modern logistics and ship design have expanded the operational calendar somewhat from historical precedents.
Taiwan’s western coastline, the side facing the mainland, has limited beaches suitable for amphibious landing. The island’s terrain rises quickly from the coastal plain, and the beaches that exist are known, mapped, and covered by Taiwanese defensive planning. Any PLA landing force would be arriving at beaches that have been prepared for their reception, mined in some sectors, covered by pre-sited artillery and anti-armor systems, and defended by ground forces positioned to maximize the advantage of interior lines against an attacker who must coordinate across an open-water crossing.
The PLA’s response to these constraints has been to build a force that attempts to overwhelm the defender across multiple dimensions simultaneously rather than to solve the individual tactical problems one at a time. The joint fire strike campaign — a sustained missile and air attack designed to suppress Taiwan’s air defenses, destroy its naval surface fleet, and degrade its ground forces before the first amphibious wave lands — is the opening phase of PLA operational planning. The logic is that an amphibious assault against a defender whose integrated air defense system is intact, whose naval forces can attack the crossing force, and whose ground units are in prepared positions is enormously costly. The fire campaign attempts to degrade each of these defenders before the crossing begins.
The amphibious lift capacity of the PLA has grown substantially over the past fifteen years. The PLAN now operates Type 075 landing helicopter docks — vessels comparable in capability to American Wasp-class amphibious assault ships — along with a growing fleet of Type 071 amphibious transport docks and older landing ship tank and landing ship medium vessels. The civilian ferry fleet that China has requisitioned into military planning adds substantial additional capacity: Chinese military planners have invested in the ability to use roll-on/roll-off ferries and other commercial vessels as military logistics platforms, which increases the total tonnage available for a crossing operation well beyond the dedicated military lift.
The sequencing problem is the deepest analytical challenge. A force large enough to overwhelm Taiwan’s defenses requires a marshaling and loading operation that cannot be fully concealed. Intelligence warning — from satellite imagery, signals intelligence, and human intelligence — would likely precede a crossing attempt by days or weeks. What happens during that warning period determines the strategic context of the crossing: whether Taiwan has time to mobilize reserves and preposition forces, whether the United States has time to deploy additional forces to the theater, whether Japan has decided on its posture, and whether the initial fire campaign has achieved its suppression objectives before the first wave enters the water.
The PLA has gamed these sequences for decades. So have the Americans and the Taiwanese. The result is an evolving military competition in which each side’s assessment of the other’s improvements drives its own next round of investment. The crossing has not been attempted. The preparation for it shapes everything that happens in the strait.