Question: Were the Battle of Antietam and Operation Undertone both during World War I?
Sentence (from "Battle of Kursk"): On 3 August, the Soviets began the second phase of the Kursk Strategic Offensive Operation with the launch of Operation Polkovodets Rumyantsev (Russian: Полководец Румянцев ) against the German forces in the southern side of the Kursk salient.
Relevant evidence: No