On May 9, 2014, a 13-ton armored vehicle tore through pro-Russian barricades in Mariupol, launching a young battalion commander into Ukrainian legend as a symbol of raw, improvisational resistance.

Today, that soldier, Maj. Gen. Mykhailo Drapatyi, assumes command of Ukraine’s armed forces in a fraught moment of military and political transition, leading his country in a battle that could have scarcely been imagined a decade ago.

It is a war both of grinding attrition and high-tech innovation, where survival is dictated by which side can adapt faster and better integrate ever-evolving weapons into the daily slog of fighting under skies saturated with drones.

General Drapatyi, 43, who was appointed the top military commander by President Volodymyr Zelensky on Tuesday night, replaced the 60-year-old Gen. Oleksandr Syrskyi. General Drapatyi represents a newer generation of post-Soviet military leadership in Ukraine that has embraced more modern approaches to warfighting.

He is one of the key architects of Ukraine’s “drone line” strategy. Instead of relying purely on static trenches holding vulnerable infantry troops, Ukraine created a continuous “kill zone” behind the front line filled with attack and reconnaissance drones and automated turrets.

That tactic has helped slow Russian advances, allowing Ukraine to take the initiative along parts of the front for the first time in years. It has also given hope to a war-weary nation that has lost tens of thousands of soldiers.

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