The biggest growth was in workers recruited from Turkey. On 30th October 1961, the FRG and Turkey signed a labour recruitment agreement to take on Turkish workers. After receiving vaccinations and passing a medical fitness test, hundreds of thousands of Turks boarded trains in Ankara and Istanbul to the FRG. The workers arrived in Munich to be distributed among industrial centers. By 1986, 1.8 million guest workers from Turkey were in West Germany.