Fraternization in the military relates to prohibited personal relationships between military service members of different ranks and positions.
Fraternization involves improper relationships, ranging from overly casual relationships to friendships to romantic relationships.
The key here in this example is whether you’re building a team or building a personal relationship. If an officer and enlisted service member were married before joining the service or before the policy was enacted, that relationship would not violate the fraternization policy.
Also, officers and enlisted service members in the Reserves or National Guard may have an ongoing business relationship based on their civilian jobs.
The policy specified certain relationships that are always improper such as relationships between officers and enlisted service members that are personal, involve ongoing business, or involve gambling.