The blackmail tactic worked. In the afternoon of March 6, the two sides, under intense Chinese pressure, signed a “Preliminary Convention,” wherein the French recognized the “Republic of Vietnam” as a “free state” (état libre) within the Indochinese Federation and French Union; the Vietnamese agreed to welcome twenty-five thousand French troops for five years to relieve departing Chinese forces; and France in turn agreed to accept the results of a future popular referendum on the issue of unifying the three regions.18 The new National Assembly in Hanoi, which had been elected in January,
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