The American soldiers off the plane at a Royal Air Force base in Darwin Australia today.
About 200 U.S. Marines, the first batch of about 2,500 U.S. troops will be deployed in northern Australia, today the city of Darwin when the two countries to strengthen defense ties.
U.S. troops already there on rotation basis every 6 months and will participate in training activities with the Australian Defence Force.
The two countries are strengthening defense ties with U.S. plans to deploy a powerful force of 2500 troops in northern Australia by 2017.
The move was "antagonizing" the U.S. and Australia Beijing but stressed that this is not an attempt to contain China.
Australian Defense Minister Stephen Smith said the decision was welcomed U.S. troops to deal with the global balance is changing.
In a joint statement, Mr Smith, Prime Minister Julia Gillard and Premier territory north of Australia Paul Henderson said that the deployment as "a progress of current activities" that the defense forces of the two countries involved.
They said it was the latest chapter in the security relationship lasted 60 years and will enhance the capabilities of both forces to participate in campaigns and joint training activities.
Last week, Australia played down reports that the country is open plan to allow a U.S. military base in a remote archipelago in the Indian Ocean.
The move by Australia and the United States worried that China, amid growing tension on the sovereignty dispute over the South China Sea.
Canberra and Washington are longtime allies, but China is the largest trade partner of Australia. According to the BBC