Question: The battle where Bodo Sandberg earned the Cross of Merit and the Airman's Cross for his bravery started on what date?
Sentence (from "Bodo Sandberg"): Bodo Sandberg (September 23, 1914 - May 2, 2005) was a fighter pilot in the Royal Netherlands Air Force and 'Engelandvaarder' during World War II.
Relevant evidence: No