Complex sentence: The intervention of Turkish troops had been opposed by the U.S. German government has announced that it will call back the German AWACS personnel watching NATO airspace above Turkey if Turkish troops engage in fights in northern Iraq.
Split into simpler sentences: The intervention of Turkish troops had been opposed by the U.S. government. The German government has announced that it will call back the German AWACS personnel watching NATO airspace above Turkey if Turkish troops engage in fights in northern Iraq.