Info via Reuters:
As northern Australia re-emerges as a strategically vital Indo-Pacific location amid rising tensions with China, the United States has quietly begun constructing hundreds of millions of dollars’ worth of facilities there to support B-52 bombers, F-22 stealth fighters, and refuelling and transport aircraftpart of a larger effort to distribute U.S. forces around the region and make them less vulnerable.
More at that link above.
Darwin is north of Tindall base. Both mentioned in the article.
This article was written by Eamonn Sheridan at www.forexlive.com.