Ukrainian President Volodymyr Zelensky has signed a law allowing to call up reservists for military service without announcing a mobilization, his office said on April 21.
Russia's War Against Ukraine
Associated Press: Ukraine adopts military reservist law amid Russia tensions

This handout picture taken and released by Ukrainian Presidential Press Service on April 8, 2021 shows Ukrainian President Volodymyr Zelensky on the frontline near Zolote, Luhansk region, eastern Ukraine.