Yes, an active duty soldier can legally marry someone from another country while stationed abroad. The ability to marry someone from another country while serving in the military is subject to the laws and regulations of both the host country where the soldier is stationed and the laws of the soldier's home country.
In many cases, military personnel may need to follow specific procedures and obtain the necessary legal documentation to marry a foreign national. This could include obtaining permission from their commanding officer, complying with any host country requirements, and ensuring they meet the legal requirements for marriage in both countries.
It's important for the soldier to consult with their military unit's legal office or a legal assistance attorney to understand the specific procedures and requirements for marrying someone from another country while stationed abroad. Additionally, seeking advice from legal authorities in the host country where the marriage is intended to take place is also crucial to ensure compliance with local laws and regulations.