Lee arrived in Washington, DC, on 5 May 1942, where he attended two weeks' of conferences about Bolero and the form of organization for the ETO SOS that Marshall and Somervell had in mind. They were determined that the organization of the SOS in the theaters of war should be identical to that of the USASOS in the United States. During World War I, this had not been the case, and the resultant overlapping and criss-crossing lines of communication had caused great confusion and inefficiency, both in Washington and in Tours. Somervell instructed each chief in the USASOS to recommend the best two men in his branch, one of whom would accompany Lee, while the other remained in Washington. For his chief of staff, Lee chose Colonel Thomas B. Larkin, who was promoted to brigadier general.