I’ve added the following:
Military Intelligence Code No11 was a 5-letter codebook, printed in 1933. It was enciphered with substitution tables.
Source was the book ‘The history of codes and ciphers in the United States during the period between the world wars part ii. 1930-1939’.
Under Military systems
The Military Intelligence Code No5 had been printed in 1918, Military Intelligence Code No9 in 1919, Military Intelligence Code No10 in 1927, Military Intelligence Code No11 in 1933 and Military Intelligence Code No12 in 1935.
The War Department Confidential Code No1 was introduced in the 1930’s. It was not a new codebook but rather the old Military Intelligence Code No5, provided with a new title page and supplement.
It seems that the War Department Confidential Code No2 also followed this system. According to a 1943 message of the Japanese military attaché in Hungary the War Department Confidential Code No2 was the same as the Military Intelligence Code No12.
Under Diplomatic and OSS systems
Apart from diplomatic messages their success against State Department systems also allowed them to read messages of other US agencies such as the OSS -Office of Strategic Services Bern station, Military Attaché in Switzerland. Office of War Information representative in Switzerland and possibly the Foreign Economic Administration, War Shipping Administration, Office of Lend-Lease Administration and the War Refugee Board.