The v-shaped valley extends northwest from Sarana Bay on Attu's east coast before angling northeast to Chichagof Harbor.[2]Sarana Pass connects the valley to Holz Bay.[3] Attu Island was attacked and taken by Japanese forces six months after the attack on Pearl Harbor.[4] In the course of retaking the Island, U.S. forces were surprised in the Sarana Valley by 800 Japanese soldiers in a unsuccessful offensive attempt. Retaking the island cost 1500 American lives and 4350 Japanese lives.[5]