Those engaging in fraternization can be brought up on Uniform Code Military Justice (UCMJ) charges. A relationship is considered fraternization even if the parties are in different units, different commands, or even different branches of service. ... In short, it extends to all officer/enlisted relationships.

Is fraternization between branches illegal?

Fraternization becomes a criminal offense under Article 134 of the Uniform Code of Military Justice when the conduct "has compromised the chain of command, resulted in the appearance of partiality, or otherwise undermined good order, discipline, authority, or morale," according to the Manual for Courts-Martial (PDF).

Can different military branches date?

When one military member marries another, the couple becomes a “dual military” couple, also known as mil-to-mil marriages. ... Dual military couples are common, and the number of same-service couples may be larger than those who marry someone from a different branch of service.