While China's expanded drills surrounding Taiwan have marked an unprecedented military and political warning against outside interference over the island, they opened a window to gather intelligence for the United States and its allies.
The four days of intense drills last week — and extended maneuvers this week — provide an opportunity to scrutinize the missiles China would use to drive off foreign militaries intervening in any future invasion as well as its command, control and communications systems, regional diplomats and security analysts say.
And on the strategic intelligence front, the exercises have given a clue to China's ability to blockade the island as a prelude or alternative to any invasion, showcasing the firing of ballistic missiles over Taiwan for the first time as well as simulated air and sea attacks on ships on its east coast.
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