[Note 1] Ehle was born on 28 April 1913 in Windhuk in German South West Africa, present-day Windhoek is the capital and largest city of the Republic of Namibia.

[1] At the start of the war Ehle flew with 3./ZG 1 and was credited with three daylight kills before the unit was redesignated 3./Nachtjagdgeschwader 1 (NJG 1) and he became a night fighter.

Following the 1939 aerial Battle of the Heligoland Bight, RAF attacks shifted to the cover of darkness, initiating the Defence of the Reich campaign.

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

[7] This and the ♠ (Ace of spades) indicates those aerial victories which made Ehle an "ace-in-a-day", a term which designates a fighter pilot who has shot down five or more airplanes in a single day.