US Defense.

What are the US and Australian military forces agreeing to currently? What the specific implications of this agreement?
The US and Australian military forces are agreeing on a scheme which provides more US access to Australian land for the purpose of facilities.

What is the name of the summit where Australia's Defense Minister and the US's Secretary of Defense will meet?
The AUSMIN summit.

Which country is the US specifically reacting to?
The US is reacting to the increasing military power of China.

What are the US planners looking to achieve with this agreement regarding troop movement?

They are looking for more ways to move troops around the world by breaking the globe down into regions.

What are other key areas of discussion at the summit?

cyber security, progress in Afghanistan and the state of the Joint Strike Fighter project.

What does this agreement mean for Australia's future in the Regional and Global context?

Australia's international security in the region will increase as military ties with the United States increase and Australians position in the world will also increase as they gain more power.