<prompt> Ngwala tšwelopele ya serapa se - Ge Ntwa ya II ya Lefase e thoma, Purvis o ile a kgethwa ke mmušo wa Brithania gore e be molaodi-pharephare wa British Purchasing Commission, yeo e bego e ikarabela ka go reka ditlabakelo tša ntwa go tšwa United States. Gape e be e le modulasetulo wa Anglo-French Purchasing Board, moo a ilego a šoma gotee le Jean Monnet. Ka June 1940, ge Fora e be e le kgaufsi le go phetha go kgaotša ntwa  <response>: ka Jeremane, Purvis o ile a rulaganya go tšea dikonteraka ka moka tša dibetša tša Fora tšeo di bego di sa tšwa go phethwa kua United States ka theko ya 612 milione. Purvis o ile a rerišana le ma-Brithania ka September 1940 gore a hwetše dilo tše bjalo ka dikepe tša torpedo, difofane le dibetša tšeo United States e bego e tla di nea ma-Brithania go tlaleletša go dikepe tše 50 tša ntwa e le karolo ya Tumelelano ya Destroyers for Bases. 