I have read three of the four volumes of Pogue's biography. This one covers the period after the war when Marshall took the position of Secretary of State, then President of the American Red Cross, then Secretary of Defense. It tells the story of his China mission, which was a hopeless task taken only at the request of President Truman. It resulted on calumny and vitriol by the right wing of the Republican Party. I have to say, as a conservative Republican, that the party did not distinguish itself at the time. Joe Martin, Speaker of the House briefly in 1946 to 1948, and Senator Jenner, plus Senator McCarthy disgraced the Republican Party with their antics. It is true that there were communists, like Harry Dexter White and Alger Hiss, in Roosevelt's government, but the attacks on Marshall made the task of resuming a sensible foreign policy more difficult.
The attacks on General Marshall validated much of the left's defense of traitors and fellow travelers which only delayed the reckoning that followed the war. The book describes the Marshall mission to China and the Palestine Mandate problems. Marshall finally resigned in 1950 only to be called called back when Korea revealed the failures of the Truman administration's post war policies. Marshall longed for retirement to Virginia but answered the call of his commander. This book is interesting in describing the post war controversies that have been mostly forgotten on recent years. It is worth the time.