What would happen if a military confrontation erupted in East Asia, placing the United States and Taiwan on one side and China and North Korea on the other? And how could a war beginning in the Taiwan Strait escalate within days into a regional conflict approaching the threshold of nuclear use?
This is not a prediction of what will happen. It is a hypothetical scenario developed by American research and military institutions to simulate the course of a possible war in East Asia. Known as “Guardian Tiger”, the exercise is designed to test military vulnerabilities and examine potential pathways of escalation.
The simulation begins in 2030, when China mobilises forces opposite Taiwan and launches missile strikes against command-and-control centres. At the same time, Chinese vessels move to conduct amphibious and airborne landings along the island’s western coast while imposing a naval blockade intended to sever supply lines.
Beijing simultaneously conducts cyber and space-based attacks targeting US military networks across the region in an attempt to disrupt any American intervention. Taiwan, however, supported by the United States, manages to thwart the Chinese landing operation, pushing the confrontation into a more dangerous phase.
Rather than retreating, China expands its military operations and launches short-range ballistic missiles at US bases in Okinawa and western Japan.
North Korea, meanwhile, takes advantage of Washington’s focus on Taiwan to increase pressure on South Korea, launching missiles and conducting cyberattacks against its military networks.
The conflict consequently develops into two simultaneous fronts: one centred on Taiwan and another on the Korean Peninsula, with Japan and South Korea joining the American side.
Washington responds by activating a joint allied operations command and deploying advanced fighter aircraft to Japan. US forces continue targeting Chinese forces attempting to take Taiwan, while avoiding strikes on Chinese territory at this stage out of concern that doing so could broaden the war.
Nuclear Brinkmanship
The escalation nevertheless continues.
According to the simulation, China begins threatening the use of nuclear weapons in an effort to force its adversaries to halt the war. It continues attacking targets in Japan and Taiwanese infrastructure while carrying out cyberattacks against ports and airports being used to receive US reinforcements.
North Korea then enters the confrontation more directly, conducting special operations and drone attacks against US military facilities in South Korea. The United States responds by striking North Korean missile launchers and military sites.
The simulation reaches its most dangerous stage when it assumes that China places a nuclear weapon into an orbital trajectory around the Earth, creating the possibility of threatening the United States from directions that would be difficult to anticipate.
At the same time, North Korea carries out a low-yield nuclear strike against an air base in South Korea and launches missiles near Guam, the Pacific island that hosts US military bases.
Faced with this escalation, the simulation assumes that Washington adopts an even more dangerous option: a large-scale military campaign aimed at overthrowing North Korea’s leadership.
By this point, however, US forces have already depleted a substantial portion of their capabilities and munitions in the Taiwan war. China continues providing Pyongyang with military and logistical support, causing the American offensive to stall before reaching the North Korean capital.
China then exploits Washington’s growing military exhaustion to intensify its assault on Taiwan, with the scenario ultimately ending in the fall of the island.
The central danger identified by the simulation is therefore not simply the prospect of the United States fighting a single war against China in East Asia. It is the possibility that a second front could erupt simultaneously on the Korean Peninsula, forcing Washington to divide forces and munitions between two major theatres.
The exercise also exposes the difficulty of containing nuclear escalation and maintaining alliance cohesion once a regional conflict expands.
A confrontation beginning over Taiwan, the simulation suggests, could rapidly develop into a multi-front regional war whose trajectory and consequences become increasingly difficult for any of the parties to control.
