Question about oasis

I would like to ask when I get the oasis I dispatch some solider to protect my oasis . When the oasis becom level 0 which I supposed to lost my oasis ,will I also lose my soilder which in the oasis?
Thanks for answering my question.

No
Your troops will return to your city

make sure you hide your troops when that happnes>> or it will leave you open for attacks:(