The Ukrainian government had informed the White House about Volodymyr Zelenskyy’s decision to dismiss Valerii Zaluzhnyi, Commander-in-Chief of the Armed Forces of Ukraine, the Washington Post reported on 2 February with reference to two sources.
Source: European Pravda with reference to The Washington Post
Details: WP stated that the White House officials had not supported this decision but did not object either, recognizing this step as “the president’s sovereign choice”.
Quote: “The early warning also provided the White House an opportunity to urge Zelensky to reconsider the pivotal decision — even though it decided against doing so.”
The Washington Post adds with reference to people familiar with Zelenskyy’s thinking that he may postpone the decision about the dismissal of Zaluzhnyi indefinitely, though “that appeared unlikely”.
The main divergence between the two is that Zelensky is more optimistic about the war while Zaluzhnyi is more pessimistic. There’s also been some chatter that Zaluzhnyi could make a run at the presidency in the future so it could be a factor. This article covers most of it: https://www.theguardian.com/world/2024/jan/31/valerii-zaluzhnyi-ukraine-general-president-volodymyr-zelenskiy-rift