Australia, the UK and the US formed a trilateral security alliance to prevent Communist China from the domination in the Western Pacific and the world, the officials said on Monday.

Although the all-out war is not imminent but possible, the officials of the established and powerful democracies emphasised that China’s military rise and sovereignty disputes in the South China Sea constitute a threat to Asia and the world.

China has one strategic aim: to be dominant, first in the region and then perhaps in the world senator Jim Molan retired major general  in the Australian Army, outlined a potential scenario for Australia in the post-Afghanistan era.

The US is the target. The Chinese Communist Party's objective is to reduce US influence. Invasion of Taiwan will be the means, the senator explained. Beijing may use Taiwan to entice US naval forces to enter an area of vulnerability. China will try to inflict heavy casualties on the United States army to force it to withdrawal from the western Pacific.

One of the responses to such a threat is AUKUS, the security alliance of three naval powers.

AUKUS is a military alliance, so it is likely that the US intends the Quad to be something different — more of a mechanism for the four-member countries to cooperate on several issues, said one official under the condition of anonymity due to his rank.

The areas of the cooperation include technology with 5G mobile networks, supply chains, and vaccines, according to the statement issued by Quad after Friday's summit in Washington.

But the underlying concept is the common defence against Communist China's invasion. Australia, the US, the UK, India, and Japan would commit their troops to help Taiwan should a war break out in the Taiwan Strait.

To extend the defence umbrella, Quad Plus is planned that would include also countries like the Philippines, and possibly Malaysia. But the idea of the alliance is not to utilise armies in the conflict but rather to prevent it making it too costly for Communist China, an official explained.