 Fort Bastion covered the seaward approaches, the Motukorea and Rangitoto Channels.The defence forces abandoned Fort Bastion by the 1920s, but the site was re-activated in World War II.With the Savage Memorial being built over the earlier Artillery storage tunnels from 1940–1943, the Battery was now sited on the cliff top above the Tamaki Yacht Club, initially with 12 pounders guns, later replaced by more efficient 6 pounders.