Washington says it will sell more than $6 billion in advanced weapons to Taiwan, a decision that finally nudges forward an important arms deal that’s been delayed for several years.

With the turmoil in financial markets, most Americans’ interest in events in East Asia is understandably low. But a confrontation between Taiwan and China is a potential flash point in the future — one that would likely draw in the U.S.

Boosting Taiwan’s ability to defend itself enhances deterrence and stability in the region.

The arms deal, held up by political concerns in Washington and lengthy budget squabbles in Taiwan, notably includes $3.1 billion for an advanced version of the Patriot missile system. The weapons will help counter the hundreds of missiles that China has arrayed against the island democracy.

The deal also includes Harpoon anti-ship missiles, spare parts for Taiwan’s air force, Apache helicopters, surveillance aircraft, the Javelin guided missile system and associated command-and-control systems.

Beijing predictably objected to the deal, and said it could damage ties between the U.S. and China. But Washington is simply living up to its commitment to help defend Taiwan.

It would be far more damaging for regional stability if the United States had allowed that commitment to atrophy.