Depending on source, Beier claimed 38 nocturnal aerial victories, including 14 of which flying intruder missions, intercepting bombers on their return flight to England.

[1] Beier was born on 18 November 1913 in Homberg, present-day part of Duisburg, at the time in the Rhine Province within the German Empire.

[2] Following the 1939 aerial Battle of the Heligoland Bight, Royal Air Force (RAF) attacks shifted to the cover of darkness, initiating the Defense of the Reich campaign.

Each sector named a Himmelbett (canopy bed) would direct the night fighter into visual range with target bombers.

[4] On 10 April 1941, Beier claimed his second aerial victory, a Armstrong Whitworth Whitley bomber shot down near Chelmsford on an intruder mission over England.