Siegfried
a simple question, why Germans troops were fighting in Rotterdam at first place? After all Holland was a peaceful neutral country until Germans sneakly and unprovocatedly attacked it on early morning 10 May 40.
Juha
They were in Holland for the same reason they were in Danemark and Norway. Strategic neccesity particulary that of securing sea routes, iron supplies and preventing springboard British invasions. Without securing these countries the strategic situation was perceived as so seriously against Germany defeat would be inevitable. The invasion of Holland was extremely unpopular in Germany, the German ambassador to Holland apparently cried. Holland was friendly, genuinely neutral and it was possibly the one country that need not have been invaded. Belgium, like France, had taken small terriotory from Germany (malmedy) after WW1 as had Danemark earlier as well so there was possibly some residual resentments. Certainly having a few neutrals that maintained trade routes might have been usefull to the Reichs war efforts.
The geo-strategic situation for Germany, with a hitorically hostile France and a choke point in access to the sea is very poor for Germany.