 Complete the following phrase:  During this period Oliver Cromwell also faced challenges in foreign policy. The First Anglo-Dutch War which had broken out in 1652, against the Dutch Republic, was eventually won by Admiral Robert Blake in 1654. Having negotiated peace with the Dutch, Cromwell then proceeded to engage the Spanish in warfare, through his Western Design. This involved secret preparations for an attack on the Spanish colonies in the Caribbean. This resulted in the invasion of Jamaica, which then became an English colony. The Lord Protector became aware of the contribution the Jewish community made to the economic success of Holland, now Englands leading commercial rival. It was thisallied to Cromwells toleration of private worship of non-puritansthat led to his encouraging Jews to return to England, 350 years after 