Charles Bohlen

Charles Bohlen was an interpreter and diplomatic observer whose presence at Potsdam gave him a close view of Harry S. Truman’s first major encounters with Joseph Stalin. He helped Truman navigate conversations with Soviet leaders and later assessed his performance in negotiations. Bohlen’s testimony also exposes a sharp gap between what American participants thought Stalin understood and what he had already learned about the atomic bomb.

Preparation and Position at Potsdam

Before the conference, Truman spent a week at sea working with James F. Byrnes, William D. Leahy, and Bohlen, all closely associated with Franklin D. Roosevelt and present at Yalta. Rather than treating the voyage as a pause in diplomacy, Truman used it to press them for facts and opinions. Leahy later said the President had questioned them throughout the day; Bohlen was struck by how Truman “stuck to business,” rarely spending time on small talk. Averell Harriman would later describe Truman as “astonishingly well prepared.”

Bohlen was therefore not simply present at Potsdam as a translator. He had been part of the preparation that brought the new President into discussions about Eastern Europe, Germany, and the Soviet Union’s possible entry into the war against Japan. He was among the experienced participants who could compare Truman’s conduct with the diplomatic context inherited from Roosevelt. The book presents him as an observer close to the exchanges, but not as a decision-maker: the judgments and commitments belonged to Truman and the other officials at the table.

At the opening of one meeting with Stalin, Bohlen stood by to translate. The setting was Truman’s office, where Stalin arrived with Vyacheslav Molotov and interpreter Pavlov. Truman welcomed the opportunity for a long-awaited meeting and spoke of the importance of personal contact. An attempt by Byrnes to make conversation about Stalin’s late sleeping habits, and Truman’s informal use of the familiar nickname Uncle Joe, did little to loosen the exchange. Bohlen’s role placed him between the two leaders’ words, while his later observations also recorded the manner in which those words were delivered.

Bohlen’s Reading of Stalin

Bohlen noticed a marked change in Stalin’s appearance since their earlier meeting with Harry Hopkins in Moscow. Stalin moved slowly and stiffly, spoke little and in a low voice, and seemed to him like an old man. Truman, by contrast, appeared full of vitality. The physical contrast did not reveal the political one: Stalin’s subdued manner gave little indication of the forceful position he would maintain in negotiations.

Bohlen’s view of Stalin rested on more than this first impression. Recalling encounters at Tehran, Yalta, and Potsdam, as well as the ten days he had spent seeing Stalin with Hopkins in the spring of 1945, he described a leader who was patient, listened well, and remained controlled in manner and expression. He saw no obvious sign of the harshness behind Stalin’s public mask. Bohlen’s account thus distinguishes between what a foreign visitor could observe and what Stalin’s behavior concealed. Calmness and courtesy were not reliable evidence of openness or trustworthiness.

This interpretation helps explain why Truman initially read Stalin’s conduct as potentially encouraging. In a later lunch, Stalin disclosed a Japanese peace feeler and passed Truman a message from Sato. Bohlen remembered that the disclosure made a strong impression on the President, who took it as a possible sign that the Soviet Union might be prepared to deal openly with the Japanese. Truman did not reveal that he already knew of the Japanese overtures; he left the response to Stalin. To Bohlen, the exchange mattered because it briefly seemed to offer evidence of cooperation at a conference otherwise marked by suspicion and disagreement.

Negotiation, Judgment, and Constraint

Bohlen’s assessment of Truman’s performance at Potsdam was notably favorable, though not because the negotiations produced broad agreement. Truman wanted progress on Germany, free elections in Poland and elsewhere in Eastern Europe, and Soviet participation in the war against Japan. The Soviet commitment on Japan was the main point on which he could feel he had succeeded; on the other issues, Stalin resisted agreements that might threaten Soviet control where the Red Army was present. Truman made little headway with him.

Bohlen considered whether Roosevelt might have achieved more and thought he would probably have been less successful. Roosevelt’s personal investment in earlier agreements with Stalin, Bohlen believed, could have made him angrier when confronted with Stalin’s resistance. He judged that Truman had not been defeated or made to look foolish or uninformed in debate. In Bohlen’s account, the obstacle was not principally Truman’s inexperience: Stalin and Molotov held stubbornly to their own position, leaving little room for maneuver. The distinction is important. A conference could demonstrate a President’s competence without delivering the settlements he sought.

The Atomic Disclosure

The most consequential instance of Bohlen’s observation came when Truman casually told Stalin that the United States had a new weapon of unusual destructive force. Truman did not name the atomic bomb, explain how it had been made, or offer to share scientific information. Stalin merely said he hoped it would be put to good use against Japan. Watching from across the room, Bohlen found the response so offhand that he wondered whether Truman had made himself clear.

Other observers drew a similar conclusion. Winston Churchill watched Stalin’s face and thought that, had Stalin understood the revolution taking place in world affairs, his reaction would have been more apparent. Byrnes likewise believed Stalin had not grasped the discovery and expected him to ask for more information. Stalin never did. The scene’s apparent meaning, however, was mistaken: Soviet nuclear research had begun in 1942, and Klaus Fuchs had been supplying the Soviets with atomic secrets. Stalin understood Truman’s remark and subsequently urged Vyacheslav Molotov to accelerate the Soviet project.

Bohlen’s position makes the episode especially revealing. He was close enough to judge Stalin’s response in the room, yet the expression he observed could not disclose the intelligence Stalin already possessed. His account records both the Americans’ uncertainty and the danger of mistaking a controlled reaction for ignorance. In this way, Bohlen’s testimony gives the Potsdam scenes two layers: what the participants believed they were seeing, and what later information showed was happening beneath Stalin’s composed surface.