I want to know the answer to the following question:
Where did the US Army's 419th and 601st locate at to defend London?
All the background I'm provided with is that "The 419th and 601st Antiaircraft Gun Battalions of the US Army were first allocated to the Folkestone-Dover coast to defend London, and then moved to Belgium to become part of the "Antwerp X" project.". Is that enough to answer the question?