Ukrainian President Volodymyr Zelenskyy is thought to have taken one of his "biggest gambles" yet by replacing his top commander in a dramatic military shake-up. Col. Gen. Oleksandr Syrskyi, one of Ukraine's most experienced commanders who had led the country's ground forces since 2019, was on Thursday appointed the new head of Ukraine's armed forces amid broader military leadership changes. Zelenskyy removed Gen. Valeriy Zaluzhnyi, a widely respected and popular figure in Ukraine, following months of speculation about his future and reported tensions between Zelenskyy and Zaluzhnyi over strategy. It rep