Ukrainian President Volodymyr Zelenskyy has appointed Oleksandr Pavliuk, former first deputy defense minister, as the new commander of Ukraine's ground forces, according to a decree published on Sunday.

Pavliuk, a lieutenant-general who served in the ministry role for a year, replaces Col. Gen. Oleksandr Syrskyi after he was tapped this week as commander of Ukraine's armed forces.

On Saturday, Zelenskyy announced five other senior military appointments, filling out a rebooted team to bolster Ukraine's defense against Russia's nearly two-year-old invasion.

Ukraine is experiencing a shortage of men and equipment as it heads into 2024 having made few battlefield gains throughout the past year. It also faces a disruption in military aid from the United States, its biggest backer.