The concept of the MPT was developed to facilitate transporting musical groups to the patrol bases, forward operating bases (FOBs), Contingency Operating Bases (COBs) — like COB Speicher — and any other troop operated position. The Army bands must fit in convoys of trucks or in helicopters to move through areas of operation to put on shows. An MPT is not a set instrumentation, but a team of instrumentalists and/or singers who are tasked to perform in a certain genre. Army bands deploy genres of American blues, country music, bebop, Dixieland jazz, gospel music, rhythm and blues, salsa music, bluegrass music, rock music or barbershop quartet—and any style that the talent at hand can develop. The School of Music is developing their program to emphasize the diversity of music by training leaders to organize, rehearse and perform in small ensembles tailored to meet the troops' current interests. In this manner, an Army Band is not just the music of John Philip Sousa, but is also today's top 40 in many genres.