Joint Chiefs of Staff

The Joint Chiefs of Staff were central military advisers in decisions over wartime production, atomic weapons, and the Korean War. Their advice could define the risks and options before the government, but the account repeatedly distinguishes military judgment from the civilian authority to decide policy. That boundary was tested when military leaders sought custody of the atomic bomb, when the war in Korea demanded scarce troops, and when the chiefs ultimately concluded that General MacArthur should be relieved of command.

Role in Wartime Government

Harry S. Truman’s support for Donald M. Nelson as head of the procurement program reflected a broader conviction that control of the war effort must remain in civilian hands. In the first six months of 1942, military contracts added $400 billion to the economy, while generals and admirals were gaining influence over industry and agriculture. Truman warned that this expansion of military influence could shape the country’s political and economic structure after the war. He described the military’s function as fighting battles and specifying what it needed to do so, not directing the whole national effort.

The issue was not abstract. General Brehon B. Somervell’s Canol project, a proposed four-inch pipeline running 1,200 miles from Canada to Alaska, had proceeded secretly with little consideration of terrain, materials, manpower, expert views, or cost. Its $25 million budget item gave no details beyond military construction in Canada and Alaska. The episode illustrated how military initiative could circumvent civilian scrutiny; the account presents Truman’s insistence on civilian control as a response to precisely that danger.

The chiefs also advised on the atomic bomb, though the advisory role did not make them the final authority over its use or custody. In a meeting attended by Harry S. Truman, James V. Forrestal, David Lilienthal, the Atomic Energy Commission members, service secretaries, and other officials, an executive from Remington Arms read a request to transfer the bomb to the Joint Chiefs of Staff. The proposal argued that the officers ultimately responsible for using the weapon should possess it, both to become familiar with it and to unify command. Truman interrupted the reading and turned to Lilienthal, who argued that the question was one of broad policy and that responsibility belonged to the president in his constitutional roles.

The discussion exposed a sharp difference in emphasis. Stuart Symington recounted that military personnel at Los Alamos wanted access to the bomb to make sure it worked. Truman answered that he did not think it should be used unless absolutely necessary and distinguished it from ordinary weapons because of its destructive effects on civilians. When the military’s need to handle it was raised again, he ended the discussion. Two days later, he told Forrestal that the bomb would remain in civilian custody. The episode made the division of responsibilities concrete: military familiarity and command arrangements were weighed against the president’s authority and judgment about use.

Advising on the Korean War

At the first major Blair House conference on the North Korean invasion, the Joint Chiefs and other senior officials met with the president amid acute uncertainty about the conflict’s scope. The gathering included General Omar N. Bradley and the Chiefs of Staff General Lawton Collins, Admiral Forrest Sherman, and Air Force General Hoyt Vandenberg, alongside civilian officials and the service secretaries. Truman asked for their views after dinner and made clear that North Korea had to be stopped, while also asking about Soviet naval and air strength and requesting intelligence on possible Soviet moves elsewhere.

The advisers did not initially agree on the forces required. Sherman and Vandenberg believed naval power and air cover might be enough; Bradley and Collins opposed sending American ground forces, at least for the time being. Their concern was not simply the immediate battlefield: officials feared that Korea might be a feint in a larger strategy and that a commitment there could leave the United States exposed elsewhere. Truman nevertheless decided to send ground troops, while continuing to weigh the danger of a broader conflict.

The scale of the commitment soon became a practical and strategic problem. In early July, MacArthur requested 30,000 American ground troops to bring his Eighth Army divisions up to strength; on July 9, he called for a doubling of the forces. The Joint Chiefs continued to consider the possibility that events in Korea formed part of a wider Soviet plan. With only ten Army divisions available and only one in Western Europe, the government had to weigh requests from the distant battlefield against the defense of Europe and other obligations.

By early August, American strength at Pusan had reached 50,000; together with 45,000 South Korean troops and smaller allied contingents, the United Nations ground force numbered nearly 100,000. The Joint Chiefs were reluctant to divert more American forces for MacArthur’s proposed landing at Inchon, which Bradley regarded as an exceptionally risky plan. After intense meetings, they and the National Security Council approved the strategy in principle on August 10. Their subsequent misgivings remained serious. MacArthur’s public defense of Chiang Kai-shek’s control of Formosa also intruded into policy-making, contrary to his assurance that he would refrain from such interventions. Truman considered replacing him but did not do so at that point.

Atomic Policy and Military Advice

The chiefs’ position on the hydrogen bomb showed another form of influence: they urged a crash program. Bradley argued that debating whether one weapon was more immoral than another missed the larger issue of war itself, and his memorandum was forwarded to Truman. The account situates this recommendation among intense public and official pressure to build the weapon, while making clear that the decision emerged through debate among military, scientific, and diplomatic advisers. The chiefs could press for rapid development, but the president remained the official who had to decide the course of policy.

Command, Orders, and Accountability

The limits of military discretion became more pressing as the Korean War deteriorated. During the early-December crisis meetings, Truman’s advisers knew that the problem involved more than the Chinese offensive: they questioned MacArthur’s morale and strategy, considered whether a new battlefield commander was needed, and recognized that he had disobeyed a specific Joint Chiefs order barring the use of non-Korean forces near the Manchurian border. Yet no change in strategy was ordered, no replacement for General Walker was appointed, and no one challenged MacArthur in those meetings. Bradley later judged that he, the Joint Chiefs, and other advisers had failed the president. Dean Acheson likewise regretted that they had missed a chance to halt the unfolding disaster.

MacArthur’s later public statement and correspondence with congressional leaders intensified the conflict. In an ultimatum-like statement, he defied instructions against independent declarations of foreign policy; his letter to Representative Joe Martin argued for widening the war in Asia and declared that victory had no substitute. Truman viewed the statement as a challenge to presidential and constitutional authority, but initially moved cautiously, sending a restrained reprimand rather than immediately dismissing the commander. The caution reflected political risks as well as the extraordinary prestige MacArthur held with the public.

The Joint Chiefs eventually reached a clear military judgment. After meeting on April 8, they unanimously concluded that MacArthur should be relieved. Their reasoning was professional as well as constitutional: they had lost confidence in his strategic and tactical decisions, including the division of his forces and the November offensive launched with inadequate intelligence. They were also concerned that he was losing the confidence of field officers and troops. His insubordination to the Commander in Chief completed the case. The chiefs’ consensus supplied Truman with a military basis for action, while reaffirming the principle that a commander’s authority operated within, rather than above, civilian direction.