US Marines in Top End ready for action

With more than 2000 Marines in Australia's north, commander USMC Colonel David Banning says the force isn't just in the Top End to train, it's ready for action.

USMC Colonel David Banning insists his troops are ready for action.

The declaration comes as Defence Minister Peter Dutton hints that while maintaining peace is a "first priority", the visiting Darwin-based force could soon swell amid growing Indo-Pacific tension.

"As military members, it's our job to be prepared for the greatest range of what-if possible"