Battle of Empress Augusta Bay
On 1 November, "Myōkō" and "Haguro" sailed south from Truk with two destroyers, escorting a supply convoy to Rabaul. From Rabaul, "Myōkō" sailed with the light cruisers "Agano" and and six destroyers to escort reinforcements to the island of Bougainville. There were 1,000 Japanese Army troops carried by four fast destroyer transports. The warships sailed ahead of the transports and engaged an American force in the Battle of Empress Augusta Bay at 12:50 on 3 November.