The nuclear surgery

In 1969 the Soviet Union and China fought a border war, and Moscow let it be understood — through a diplomat in Washington, through a journalist in London, through hints to East European allies — that it was considering a nuclear strike on the Chinese nuclear programme. Beijing believed it, dispersed its leadership on 15 October and put its forces on alert on the 18th. The phrase Chinese scholarship uses for what was being threatened is a nuclear surgery.

No such plan is on the record. Every serious work on the period has looked for one and not found it. The CIA's Board of National Estimates found in May 1969 that the evidence of Soviet strategic attack preparations was "quite tenuous", and seventeen months later that the strategic forces "have not undergone any major changes that can be attributed to the confrontation with China". The eastern medium-range missile force was disbanded in September 1970 — liquidated after the crisis rather than reinforced. The strongest affirmative claim in the literature, Gobarev's, is an assertion of privileged knowledge with nothing published behind it.

So this study does not reconstruct an order. It asks the arithmetical question the literature argues about in words: given the complex that demonstrably existed and the forces that were demonstrably there, what would a disarming strike have required, and what would it have achieved? Every facility and every base is documented. The strike is not, and every readout says so.

Every operating facility of the Chinese nuclear programme is an aim point, two aircraft to each, largest weapon that reaches. Facilities under construction in 1969 are drawn and not struck. Surface bursts throughout, because the object is the works and not the people over it.

The complex was small

Eight operating facilities. A strike on the whole of China's nuclear programme is a dozen aim points, not a war. Nothing about the scale of the thing was prohibitive, and this is the part of the threat that was credible.

The missiles were in the wrong places, so the strike has to be flown

Fifty-eight launchers east of the Urals, of which fifty-five are medium-range. Between them those fifty-five reach five of the eight facilities — and neither Plant 221, the weapons design and assembly academy, nor Plant 504, the only enrichment plant China had. The only system that covers the complex is three R-14U silos at Aktyubinsk, two and a half thousand kilometres west of the border and sited against Europe.

None of the fields is in Transbaikal, Amur or Mongolia. The 45th Rocket Division at Ussuriysk, the largest of them at thirty-two to thirty-five launchers, was disbanded the year after the crisis.

The surgery is not surgical

Three of the eight stand in or beside cities. Plant 504 is inside Lanzhou, on the Yellow River in the Xigu district. Plant 202 is inside Baotou. Institute 401 is forty kilometres from the centre of Beijing. The outcome panel counts what that means on the 1969 population grid, and it is not a number a surgery produces.

And the front end is out of reach

Plant 272 at Hengyang, the milling and mining that feeds everything else, is two thousand kilometres deeper into China than the rest of the complex, and no bomber base on the list can get there and back. It is not struck.

The programme is not ended

The weapons already built are not at these addresses. China had about fifty warheads and ten tests behind it. The Third Front interior plants were already being dug — Plant 814 at Heping opened nine months later, and construction at Plant 821 began in October 1969, during the crisis. Plant 221's own relocation to Mianyang began that same month.

• Any Soviet plan, target list or order, because none has been released.
• The border war itself, the eleven Soviet divisions that became forty, and the conventional campaign this would have started. The scholarship's own answer to why Moscow did not strike is mostly about that campaign rather than about China's arsenal.
• Chinese air defence as entities, or any routing around it. The aircraft fly great circles at altitude, which the northwest of China in 1969 would very nearly have permitted.
• The Chinese answer, which is described and not flown. Two Tu-16 and a handful of DF-2A would not have changed the outcome, and drawing them would suggest a symmetry that did not exist.
• The yield, which is inferred. Five hundred kilotonnes is a round middle figure for a Soviet free-fall weapon of the period; no yield for a strike that was never planned can be documented.

The dossier at the 1969 strike question carries every figure with its source and its evidence tier, including the historiography table showing where each of the sixteen principal works stands. Facility locations are from Zhang Hui's imagery work and the Federation of American Scientists; the Soviet order of battle from CIA Board of National Estimates SM 4-69 of 6 May 1969, from FRUS XII, and from the Long Range Aviation unit histories.