Germany rejects us request to send ground troops to syria

I think there may be some confusion here. Germany has not rejected a US request to send ground troops to Syria. In fact, Germany has consistently maintained a policy of not deploying ground troops to Syria or other conflict zones.

Germany has been a strong supporter of the international coalition against ISIS and has contributed to the fight against the terrorist group through airstrikes and other forms of military support. However, Germany has not participated in ground operations in Syria or Iraq.

It's possible that you may be thinking of a different country or a different request. Could you provide more context or clarify what you're referring to? I'd be happy to help clarify things for you.