 PAVN fire had hit over 20 helicopters, 8 of which were destroyed or severely damaged, PAVN losses were unknown.The Americal Division changed its operational doctrine in the wake of that incident, mandating that ground units spearhead future rescue efforts rather than helicopter rescue teams.On 11 November, Koster combined Operation Wheeler with Operation Wallowa to simplify command and control arrangements as the mix of American units began to change in the valley.