Long March
The Chinese Red Army's ~6,000-mile fighting retreat from Nationalist encirclement; a military catastrophe the Party rebuilt into its founding legend.

By the numbers it was a defeat, and a near-total one. Roughly 86,000 soldiers and officials broke out of the Communists' base in southern Jiangxi in October 1934, fleeing an encirclement that Chiang Kai-shek's Nationalists had drawn ever tighter with a ring of concrete blockhouses. A year and some 6,000 miles later, barely eight thousand of the original column staggered into the poor loess hills of northern Shaanxi. Everything in between was loss. The Party would spend the next several decades turning that loss into its greatest asset.
A retreat, not a campaign
The march was improvised, chaotic, and murderously expensive. It began as a slow-moving caravan hauling printing presses, silver, and files, until the killing forced the column to dump its baggage and run. At the Xiang River in late 1934, the Red Army lost more than half its strength in a single week of fighting to punch through Nationalist lines. Survivors crossed snow mountains where men froze and the Great Grasslands, a high marsh that swallowed soldiers whole. They marched by night, fought running battles, and lived off what they could seize or beg. The heroic set pieces later taught to every Chinese schoolchild, above all the storming of the chain bridge at Luding, were real events dressed in decades of embellishment. The plain fact is that the vast majority of those who set out did not arrive.
The march that made Mao
Its decisive consequence was political, not military. In January 1935, at a Party conference in the town of Zunyi, Mao Zedong used the disaster to attack the leadership that had presided over it: the Comintern-appointed adviser Otto Braun and the young Moscow-trained Bo Gu. Mao won, emerging with effective control of the Red Army and a commanding voice in the Party. He was not yet the unchallenged dictator he would become, but Zunyi put him on the road there. Without the catastrophe, there is no obvious path by which Mao takes the Party. In a real sense the Long March made him.
From defeat to founding myth
What survived was smaller but harder: a core of committed cadres who had walked across a continent together and would run China for the next half-century. The Party rebuilt that ordeal into its central legitimizing legend, proof that it could endure anything, a story of sacrifice invoked in propaganda, film, and school textbooks to this day. Its propagandists rounded the combined distance of the Communist armies up to 25,000 li, the figure carved on monuments now. The heroic version reached the wider world through an American reporter, Edgar Snow, whose 1937 book Red Star Over China introduced a sympathetic Mao and his survivors to readers who knew nothing of the losses. Chinese leaders still summon the memory by name, urging the nation onto a "new Long March" whenever hard times loom. It is one of history's more remarkable feats of narrative alchemy: a rout that killed most of an army, remembered as the moment a revolution was born.