Taiwan's military activated the U.S. Army's Rapid Decision-Making and Synchronization Process (RDSP) during live port defense drills on August 10, the sixth day of Han Kuang 42, as commanders pushed the exercise into fully unscripted, decentralized operations that signal deeper integration of American doctrinal practices into Taiwan's warfighting approach.
The drills have entered Phase 4 — defense in depth and sustained operations — the most demanding stage of the exercise cycle. Storm Media journalists embedded with the Second Operational Zone watched troops conduct an overnight cross-regional reinforcement mission, marching north from Hualien to Yilan to be formally incorporated into the Lanyang Operational Sub-Zone order of battle. Lieutenant Colonel Lin Yang, commander of the Second Combined Arms Battalion, confirmed his unit had reached the Third Operational Zone and assumed garrison duties in the Lanyang area by 3:30 a.m.
Yilan's Lizejian Plain Is Taiwan's Most Exposed Eastern Flank
The choice of Yilan as a defense focus is no accident. Lizejian, a broad coastal plain in the county, has long featured in Taiwan's military contingency planning as the most likely — and currently the only viable — amphibious landing site on Taiwan's eastern coast. Counter-landing exercises at Lizejian date back to at least 2003. In December 2025, President Lai Ching-te personally inspected reserve forces training there, observing drone operations, obstacle and barrier installation, and small-unit combat drills.
For the Lanyang area specifically, military planners must account for two distinct enemy courses of action: a beach assault at Lizejian and a port seizure operation aimed at securing maritime superiority — making critical port defense the exercise's centerpiece on August 10.
RDSP Gives Platoon Commanders Authority to Break from the Plan
The more structurally significant shift on display is how far down the chain command authority has been pushed. Lin Yang said decentralization in this exercise is organized by task force rather than by conventional unit echelon. For key port defense missions, a platoon-level element can exercise full decentralized mission command authority without requiring approval from the battalion level above it — a substantial departure from the more hierarchical model Taiwan's military has historically employed.
The mechanism that restores synchronization when reality diverges from the plan is RDSP. "The enemy won't come from where we expect," Lin Yang said. "When we encounter a situation we cannot handle, I as battalion commander immediately activate RDSP. Once activated, operational guidance is immediately issued, and units execute actions that differ from the original plan." The process is designed to compress decision cycles rather than let a breakdown at one echelon freeze units waiting for orders from above.
Taiwan's military has emphasized script-free exercises across Han Kuang 42 as a deliberate training choice, stressing commanders' situational judgment rather than their ability to execute a rehearsed scenario. The adoption of RDSP — a U.S. Army decision-making framework — as the standard recovery protocol is a concrete marker of how recent Taiwan-U.S. military exchanges have reshaped doctrine on the ground.
