In Nevada, at Frenchman’s Flat, a bright flash and ugly…

““In Nevada, at Frenchman’s Flat, a bright flash and ugly mushroom cloud had signified a gigantic change in the tactical battlefield—a change that had not come about at Hiroshima, despite statements to the contrary. In its early years the atomic device had remained a strategic weapon, suitable for delivery against cities and industries, suitable to obliterate civilians, men, women, and children by the millions, but of no practical use on a limited battlefield—until it was fired from a field gun. Until this time, 1953, the armies of the world, including that of the United States, had hardly taken the advent of fissionable material into account. The 280mm gun, an interim weapon that would remain in use only a few years, changed all that, forever. With an atomic cannon that could deliver tactical fires in the low-kiloton range, with great selectivity, ground warfare stood on the brink of its greatest change since the advent of firepower. The atomic cannon could blow any existing fortification, even one twenty thousand yards in depth, out of existence neatly and selectively, along with the battalions that manned it. Any concentration of manpower, also, was its meat. It spelled the doom of Communist massed armies, which opposed superior firepower with numbers, and which had in 1953 no tactical nuclear weapons of their own. The 280mm gun was shipped to the Far East. Then, in great secrecy, atomic warheads—it could fire either nuclear or conventional rounds—followed, not to Korea, but to storage close by. And with even greater secrecy, word of this shipment was allowed to fall into Communist hands. At the same time, into Communist hands wafted a pervasive rumor, one they could neither completely verify nor scotch: that the United States would not accept a stalemate beyond the end of summer. The psychological pressures on Chinese Intelligence became enormous. Neither an evaluative nor a collective agency, even when it feels it is being taken, dares ignore evidence.””

— T.R. Fehrenbach