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Beginning in October 1944, Brigadier General Clare Hibbs Armstrong commanded the Antwerp X campaign which sought to protect Antwerp and its residents. The 789th AAA Battalion was one of the first units to set up its guns on Antwerp's outskirts in the city of Lier, Belgium. The 789th AAA Battalion held this position from late-October through mid-December. During this time, the 789th shot down more than 250 buzz bombs and its members earned their second campaign star for the Antwerp Campaign, or unofficially Antwerp X.