Iona Emmanuilovich Yakir was a Red Army commander and one of the world's major military reformers between World War I and World War II. He was an early and major military victim of the Great Purge, alongside Mikhail Tukhachevsky.

The Case of the Trotskyist Anti-Soviet Military Organization, also known as the Military Case or the Tukhachevsky Case, was a 1937 secret trial of the high command of the Red Army, a part of the Great Purge.