The battle where Bodo Sandberg earned the Cross of Merit and the Airman's Cross for his bravery started on what date?
Bodo Sandberg:  He was awarded the Cross of Merit and the Airman's Cross for his bravery during the German invasion of May 1940. Battle of the Netherlands:  The battle lasted from 10 May 1940 until the surrender of the main Dutch forces 14 May.
10 May 1940