The rescue operation that brought Jewish children from Nazi Europe to Britain before World War II was the Kindertransport.
Following the violence of Kristallnacht in November 1938, British religious and community organizations urged the government to admit unaccompanied refugee children. Britain agreed to waive normal immigration requirements for children, provided that organizers arranged foster homes or other care and paid a financial guarantee.
About 10,000 mostly Jewish children arrived in Britain between December 1938 and the outbreak of war in September 1939. Most came from Germany, Austria, Czechoslovakia, and Poland. Many traveled by train to ports and then by ship or ferry to Britain.
The Kindertransport saved the children who reached Britain, but it usually separated them from their parents, many of whom were later murdered. It should not be confused with the later rescue of Danish Jews or the postwar Kindertransport-style evacuations.