Here are a few options, depending on where you intend to use the title:
Best overall (most formal and descriptive):
“The Starobilsk Strike: Analysis of a Developing Russian Propaganda Narrative”
If you want to emphasize the incident itself:
“The Starobilsk Strike: Examining the Shift in Russian Information Warfare”
If you want to focus on the strategic impact:
“Deconstructing the Starobilsk Strike as a Focal Point for Russian Propaganda”
Recommendation: The first option is the most balanced for a formal report, article, or academic paper.