Does the USA have a "war measures act"?

[Evil Chris]

All I could find was a bit about Habeas corpus.

The Privilege of the Writ of Habeas Corpus shall not be suspended, unless when in Cases of Rebellion or Invasion the public Safety may require it.

Marshal Law (although the term is thrown around from time to time) does not exisit in the USA.

The Posse Comitatus Act (no I didn't make that up) forbids military involvement in domestic law enforcement without congressional approval. But then they go on to say that the National Guard is an exception to this.

So basically you guys can do whatever the hell you want.
Land of the free.