ates ▁provided ▁for ▁had ▁been ▁util ized , ▁and ▁the ▁British ▁offered ▁to ▁allow ▁imm igration ▁to ▁continue ▁beyond ▁cut off ▁date ▁of ▁ 1 9 4 4 , ▁at ▁a ▁rate ▁of ▁ 1 5 0 0 ▁per ▁month , ▁until ▁the ▁remaining ▁qu ota ▁was ▁filled . ▁According ▁to ▁Ar ie h ▁Koch avi , ▁at ▁the ▁end ▁of ▁ ▁the ▁war , ▁the ▁Mand atory ▁Government ▁had ▁ 1 0 , 9 3 8 ▁certific ates ▁remaining ▁and ▁gives ▁more ▁details ▁about ▁government ▁policy ▁at ▁the ▁time . ▁The ▁British ▁maintained ▁the ▁policies ▁of ▁the ▁ 1 9 3 9 ▁White ▁P aper ▁until ▁the ▁end ▁of ▁the ▁Mand ate . ▁ ▁The ▁growth ▁of ▁the ▁Jewish ▁community ▁in ▁Palest ine ▁and ▁the ▁dev ast ation ▁of ▁European ▁Jewish ▁life ▁s idel ined ▁the ▁World ▁Z ion ist ▁Organ ization . ▁The ▁Jewish ▁Agency ▁for ▁Palest ine ▁under ▁the ▁leadership ▁of ▁David ▁Ben - G ur ion ▁increasing ly ▁dict ated ▁policy ▁with ▁support ▁from ▁American ▁Z ion ists ▁who ▁provided ▁fund ing ▁and ▁influence ▁in ▁Washington , ▁D . C ., ▁including ▁via ▁the ▁highly ▁effective ▁American ▁Palest ine ▁Committee . ▁ ▁During ▁World ▁War ▁II , ▁as ▁the ▁horror s ▁of ▁the ▁Hol oca ust ▁became ▁known , ▁the ▁Z ion ist ▁leadership ▁form ulated ▁the ▁One ▁Mill ion ▁Plan , ▁a ▁reduction ▁from ▁Ben - G ur ion ' s ▁previous ▁target ▁of ▁two ▁million ▁imm igr ants . ▁Following ▁the ▁end ▁of ▁the ▁war , ▁a