U.S. Marines and Sailors with Marine Medium Tiltrotor Squadron 166 Reinforced, the air combat element of the 13th Marines Expeditionary Unit, bought pink unit patches to raise money for breast cancer research during Breast Cancer Awareness Month. One dollar from every patch sold was donated. - U.S. Marines and Sailors with Marine Medium Tiltrotor Squadron 166 Reinforced, the air combat element of the 13th Marines Expeditionary Unit, bought pink unit patches to raise money for breast cancer research during Breast Cancer Awareness Month. One dollar from every patch sold was donated.