american civil war

[pwh]

I have seen a photo of  one of my ancestors who was born in New York  but came to  Australia,
in a US Army uniform. The photo was taken in 1862. By this time he was already a British
subject. Did he have to be a US citizen to serve in the US army at the time?  My  limited knowledge
of the Civil War  says he did not. Can someone  tell me if i right or wrong?
                                                                                                         Thanks
                                                                                                                      pwh

[Erato]

There were, of course, two armies  -  the Union Army [the northern states] and the Confederate Army [the southern states].  Neither one demanded citizenship to 'volunteer' for service.  Many foreign immigrants and outright foreigners served on both sides, but more for the Union than the Confederacy.

Edited to add - since he was born in the United States, he would have been considered a US citizen even before the 14th Amendment to the Constitution.

[pwh]

erato
             It seems that he would have had dual British and American  citizenship. Thanks
for clearing that up.
                                        pwh