evidence: Both the Ukrainians and the Russians have used cluster bombs since Moscow’s forces invaded in February 2022. More recently, Ukrainian forces have begun using Turkish-provided cluster munitions on the battlefield. [...] The Southern Military District has been heavily involved in the invasion since it began in February 2022. The Southern is one of four land districts into which the Russian armed forces are organized. [...] Zelensky said Saturday that five men, part of the Azovstal defense that defended Mariupol following Russia’s invasion in February 2022, would return to Ukraine from Turkey. The five Ukrainian soldiers had surrendered following the fall of the southeastern city.