KYIV, Ukraine – President Volodymyr Zelenskyy shook up his wartime government, drawing thousands into the streets Thursday across Ukraine to protest the ouster of his youthful defense minister — seen as an innovator of the country’s successful drone technology but who clashed with the traditional military establishment.

The personnel overhaul, which included replacing his prime minister, could become a test of Zelenskyy’s political authority as Ukraine’s fight against Russia’s full-scale invasion approaches 4½ years. Zelenskyy has remained in office under martial law because wartime elections are prohibited but has periodically reshuffled his government.

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