As part of the Quebec Agreement in August 1942, a team of British scientists led by Sir James Chadwick, and included Rudolph Peierls, M.L.E. Oliphant, Otto Frisch, James Tuck, Klaus Fuchs, and 13 others, assisted the Manhattan Project in many critical areas. These scientists served diligently at Los Alamos throughout the war, and some even remained after its conclusion.