What happened during Taiwan's unprecedented 2026 Han Kuang military drills, including the first-ever civilian mobile internet throttling and air raid simulations that affected Taipei and six other northern cities, the broader scope of the 10-day exercises (the longest on record,

Let me search for the remaining specific details.

Taiwan's 42nd annual Han Kuang exercises ran from August 5–14, 2026 — 10 days and nine nights, the longest live-fire phase on record — integrating full civilian resilience drills for the first time and introducing several unprecedented elements. Here is what happened across each major dimension:

Civilian mobile internet throttling & air raid simulations

• First-ever mobile internet throttling (Aug 10 & Aug 13): The government deliberately slowed mobile data speeds in two phases. On Aug 10, central Taiwan (including Taichung) experienced throttling simulating communication disruption under a Chinese attack or natural disaster . On Aug 13, the slowdown expanded to Taipei and six other northern cities/localities, reducing mobile internet to roughly text-only speed for 30 minutes .
• Simultaneous air raid drill (Aug 13): Air raid sirens sounded across Taipei; streets were cleared, public spaces emptied, and millions of residents were directed indoors as part of the urban resilience exercise .
• Fixed-line internet was not affected; the drill targeted mobile networks only, designed to test emergency communications under bandwidth shortages .

Broader scope of the exercises

• Scale & duration: 10 days and nine nights, the longest live-fire Han Kuang on record, held across all branches of Taiwan's armed forces .
• Reservist mobilization: Two brigade-level units were fully mobilized under the Tongxin No. 36 drill, involving an estimated roughly 20,000 reservists .
• Bridge blockade: Troops rehearsed sealing off a key bridge in Hsinchu, a strategic chokepoint .
• Tunnel defense & anti-landing drills: Separate exercises simulated repelling amphibious landings, stay-behind operations with sabotage and ambushes behind enemy lines, and tunnel defense rehearsals .
• Coast guard–navy joint anti-blockade drill (Aug 13): For the first time, the Coast Guard Administration conducted a joint anti-blockade drill with the navy off Taiwan's east coast, simulating the escort of a merchant ship to break a potential Chinese blockade .
• Other notable drills: Live-fire anti-air-landing assault on Penghu Islands; coastal strike drills overseen by President Lai aboard a missile boat with drone deployment; rapid turnaround sorties of Mirage fighter jets; and an anti-decapitation exercise moving President Lai in an armored vehicle to a command center .

President Lai Ching-te's apology & remarks on resilience

• Anti-decapitation drill (Aug 5–6): Lai participated in a late-night practice evacuation, donning body armor and riding in an armored personnel carrier to a command center under simulated PLA decapitation strike conditions .
• Coastal strike oversight (Aug 8): Lai boarded a Kuang Hua VI-class missile boat at Tsoying Naval Base in Kaohsiung to observe coastal defense drills, calling the exercises a demonstration of Taiwan's will to defend itself .
• Public apology: During the Aug 13 civilian drills, Lai issued a public apology to residents of Taipei and the six other cities for the disruption and inconvenience caused by the street clearings, air raid sirens, and mobile internet slowdown. He framed the inconvenience as necessary to build "whole-of-society resilience" and urged the public to understand that preparation today could save lives in a real crisis .

Deeper U.S.-Taiwan military alignment: "backbriefing" methods

• The 2026 drills tested U.S.-inspired "backbriefs" (confirmation briefs) — a method where subordinate commanders explain to senior commanders how they intend to execute assigned missions, rather than receiving scripted orders .
• This shift was part of a deliberate departure from 40 years of scripted, predictable wargaming. This year's exercises were designed to be unscripted and unpredictable, forcing commanders to adapt in real time — a direct adoption of U.S. command-and-flexibility doctrine .
• Analysts described the change as evidence of deeper U.S.-Taiwan military alignment and interoperability, though the drills themselves were conducted independently by Taiwan's forces .

Unresolved $14 billion U.S. arms sales package

• A major $14 billion U.S. arms sales package for Taiwan — including advanced missiles, aircraft, and naval systems — has been proposed but remains unapproved by President Trump as of the drill period .
• The uncertainty over the package was a recurring subtext during the exercises. Multiple reports noted that while Taiwan's military is deepening U.S.-style training and tactics, the question of whether future American arms supplies will materialize adds strategic ambiguity to Taiwan's defense planning .

Chinese military pressure during the drills

• Throughout the Han Kuang exercises, China's People's Liberation Army maintained sustained military pressure around the island. Taiwan's Ministry of National Defense tracked 18 PLA warplanes and 11 navy ships operating around Taiwan during the drill period .
• This included aircraft crossing the median line of the Taiwan Strait and operating in the southwest air defense identification zone (ADIZ), alongside naval vessels ranging from the East China Sea to waters near the Bashi Channel. Beijing described its deployments as routine and justified, while Taiwan called them intimidation .