The president and congress make the final decision as to where troops are deployed. The president has a 90 day window where he can deploy troops without congress consent but after that congress must approve of the deployment.
I'm drunk right now.
As in Vietnam, Australia was asked to by the US.
The President.
Executive
September 1957.
No, Russian troops are not in the US
There are currently about 48,000 US troops in Japan
40,000,000 troops
December 29, 1778
The US asked them to.
There are no US troops presently in Iran (as of May 2008)
There are no US troops in Syria, so there is no-one to withdraw.
The United States withdrew troops from Somalia