Not necessarily in Europe, if the military aircraft are flying under Operational Air Traffic (OAT) rules as opposed to General Air Traffic (GAT) who follow the civilian ANSP rules.
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Operational Air Traffic (OAT)
Description
The term Operational Air Traffic (OAT) is applied in Europe to all flights which do not comply with the provisions stated for
general air traffic (GAT) and for which rules and procedures have been specified by appropriate national authorities. (EUROCONTROL EATM Glossary of Terms)
Most OAT flights are operated by military agencies."
Operational Air Traffic (OAT) - SKYbrary Aviation Safety