Produced by Greg Weeks, Sankar Viswanathan, and the Online Distributed Proofreading Team at http://www.pgdp.net Transcriber's Note: This etext was produced from Amazing Stories January 1951. Extensive research did not uncover any evidence that the copyright on this publication was renewed. [Illustration:] OPERATION R.S.V.P. By H. Beam Piper _Vladmir N. Dzhoubinsky, Foreign Minister, Union of East European Soviet Republics, to Wu Fung Tung, Foreign Minister, United Peoples' Republics of East Asia_: 15 Jan. 1984 Honored Sir: Pursuant to our well known policy of exchanging military and scientific information with the Government, of friendly Powers, my Government takes great pleasure in announcing the completely successful final tests of our new nuclear-rocket guided missile _Marxist Victory_. The test launching was made from a position south of Lake Balkash; the target was located in the East Siberian Sea. In order to assist you in appreciating the range of the new guided missile _Marxist Victory_, let me point out that the distance from launching-site to target is somewhat over 50 percent greater than the distance from launching-site to your capital, Nanking. My Government is still hopeful that your Government will revise its present intransigeant position on the Khakum River dispute. I have the honor, etc., etc., etc., V. N. Dzhoubinsky [Illustration:] _Wu Fung Tung, to Vladmir N. Dzhoubinsky_: 7 Feb., 1984 Estimable Sir: My Government was most delighted to learn of the splendid triumph of your Government in developing the new guided missile _Marxist Victory_, and at the same time deeply relieved. We had, of course, detected the release of nuclear energy incident to the test, and inasmuch as it had obviously originated in the disintegration of a quantity of Uranium 235, we had feared that an explosion had occurred at your Government's secret uranium plant at Khatanga. We have long known of the lax security measures in effect at this plant, and have, as a consequence, been expecting some disaster there. I am therefore sure that your Government will be equally gratified to learn of the perfection, by my Government, of our own new guided missile _Celestial Destroyer_, which embodies, in greatly improved form, many of the features of your own Government's guided missile _Marxist Victory_. Naturally, your own scientific warfare specialists have detected the release of energy incident to the explosion of our own improved thorium-hafnium interaction bomb; this bomb was exploded over the North Polar ice cap, about two hundred miles south of the Pole, on about 35 degrees East Longitude, almost due north of your capital city of Moscow. The launching was made from a site in Thibet.