This is the 2907th most frequent Russian word.
военнослужащим
"Военнослужащим" means "serviceman" or "service member" (a person serving in the military).
In this sentence, 'военнослужащих' is used in the plural genitive case to denote military personnel collectively, showing respect for their service.
Военный парад был организован в честь всех военнослужащих.
The military parade was organized in honor of all service members.
Here 'военнослужащим' is in the instrumental singular form, indicating the individual's status as a military serviceman.
После долгих лет службы он стал уважаемым военнослужащим.
After long years of service, he became a respected military serviceman.
The word 'военнослужащим' is used in the instrumental singular case to express the role or profession the subject desired to achieve.