Croatian soldiers from the Honor Guard Battalion perform the Ceremony of the Changing of the Guards at Ban Josip Jelacic Square to mark the 28th anniversary of the Croatian Army in Zagreb, Croatia, on May 26, 2019. (Xinhua/Josip Regovic)

Croatian soldiers from the Honor Guard Battalion perform the Ceremony of the Changing of the Guards at Ban Josip Jelacic Square to mark the 28th anniversary of the Croatian Army in Zagreb, Croatia, on May 26, 2019. (Xinhua/Josip Regovic)

Croatian soldiers from the Honor Guard Battalion perform the Ceremony of the Changing of the Guards at Ban Josip Jelacic Square to mark the 28th anniversary of the Croatian Army in Zagreb, Croatia, on May 26, 2019. (Xinhua/Josip Regovic)

Croatian soldiers from the Honor Guard Battalion perform the Ceremony of the Changing of the Guards at Ban Josip Jelacic Square to mark the 28th anniversary of the Croatian Army in Zagreb, Croatia, on May 26, 2019. (Xinhua/Josip Regovic)