Contact the German embassy or consulate. Explain your situation and they will tell you whether you have lost your German citizenship or not and will tell you if you can regain it.
Yes, you can apply for German citizenship and be a dual citizen regardless of the fact if your mother was still a German citizen or not.
The US recognizes dual citizenship.
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Yes, it is possible to have dual citizenship in the US. This means you can be a citizen of the US and another country at the same time.
Yes, it is possible to have dual citizenship while serving in the US military.
Yes, it is possible for a US citizen to hold dual citizenship with another country.
By law, the US doesn't recognize dual citizenship (i.e. constitution prevents dual nationality) but somehow it always does recognize it.
No. The US president MUST have US citizenship only.
Yes dual citizenship is allowed for US citizens.
Yes, a US citizen can obtain dual citizenship, which means they can hold citizenship in the United States and another country at the same time.
Yes.
Yes, members of the US military can hold dual citizenship, but there are restrictions and regulations that they must follow.