Here are a few formal options, each with a slightly different nuance:
Option 1 (Neutral and Direct)
Air Chief Condemns Misinformation and Hostile Narratives Surrounding Military Operations
Option 2 (Emphasizing the Source)
Military Leadership Denounces Falsehoods and Adverse Narratives on Operations
Option 3 (More Formal/Action-Oriented)
Air Force Chief Rebukes Adverse Narratives and False Claims on Military Campaigns
Option 4 (Concise)
Air Chief Refutes Misinformation and Hostile Narratives on Operations
By Press Room