On 20 March 2026 , Taiwan’s Defence Minister Wellington Koo warned that the rapid deterrence against China must be strengthened to keep any invasion plan of Taiwan unattractive. Key Developments U.S. intelligence community (USINT) assessment on 18 March 2026 states China does not plan an invasion in 2027 but aims to control the island without force. Minister Koo reiterated that China has not abandoned the option of using force and continues high defence spending. China’s Foreign Ministry urged the United States to stop “hyping” the China threat. President Lai Ching‑te proposed an additional $40 billion in defence outlay, facing parliamentary delays. Taiwan showcased a domestically built submarine in sea trials and highlighted upgrades to two Dutch‑built submarines. Important Facts China’s military expansion remains “very serious” according to Minister Koo. Improved Taiwanese defence capability reduces Beijing’s risk‑benefit calculation for an attack. One Dutch‑built submarine has completed its upgrade; the second is slated for completion by year‑end. The opposition in Taiwan’s Parliament argues the proposed defence budget is vague and resists “blank cheques”. UPSC Relevance The episode illustrates several core UPSC themes: (i) deterrence as a tool of strategic stability; (ii) the role of U.S. intelligence in shaping regional security narratives; (iii) the impact of domestic politics on defence procurement and budgeting; and (iv) maritime security dynamics, especially the significance of submarines for island defence. Candidates can link these to GS2 (International Relations) and GS3 (Security & Defence). Way Forward Accelerate the upgrade of existing submarines and fast‑track indigenous naval platforms to close capability gaps. Enhance joint exercises with like‑minded partners to signal credible deterrence . Seek bipartisan consensus in Parliament for a transparent, phased defence spending plan. Monitor China’s military modernization trends through open‑source and intelligence channels to adjust strategic postures promptly.