 Complete the following phrase:  Fremantle was charted as a municipality in 1883, and the following decade its harbour was deepened for commercial shipping, transforming the port into a bustling trade centre and gateway at the height of the Western Australian gold rushes. Declared a city in 1929, Fremantle played a key role in World War II as the largest submarine base in the Southern Hemisphere. Post-war immigration from Europe, particularly Italy, helped shape Fremantles character, and it rapidly gentrified after hosting the 