To cover the landings of these troops and provide support for the operation to retake Henderson Field from Allied forces , Yamamoto directed Chuichi Nagumo to sortie with a carrier force from Truk on 21 August and head towards the southern Solomon Islands .
To cover the landings and retake Henderson Field from Allied forces , Yamamoto directed Chuichi Nagumo to meet with a carrier force from Truk on 21 August and head towards the southern Solomon Islands .