Rubuta ci gaba ga wannan sakin layi - A shekarar 1943, Janar Joseph Stilwell ya bukaci tura sojojin Amurka na musamman don tallafawa sojojin kasar Sin a karkashin umurninsa. Janar George Marshall ya ba da izini ga "Rukunin Tsallakewa mai Tsayi", wanda aka tattara daga sojojin Amurka da aka horar da su a yaƙin daji a Panama da kuma Amurka, da kuma ma'aikatan da ke da kwarewar yaƙi a tsibirin Solomon
da kamfen din New Guinea. An sanya sunan wannan rukunin a hukumance a matsayin 5307th Composite Unit (Provisional), amma ya zama sananne a matsayin "Merrill's Marauders"; ya aiwatar da ayyukan a Burma a shekarar 1944.