The story
Calque from Chinese 長征 (chángzhēng).
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A military retreat undertaken by the Red Army of the Communist Party of China, the forerunner of the People's Liberation Army, to evade the pursuit of the Kuomintang (KMT or Chinese Nationalist Party) army. Full definition →
Calque from Chinese 長征 (chángzhēng).
Etymology from Wiktionary, CC BY-SA 4.0.