The Marine Corps League Auxiliary was chartered on September 4, 1937 as a subsidiary organization of the Marine Corps League. On August 25, 1950, the Auxiliary was incorporated under the laws of the District of Columbia as an affiliate of the Marine Corps League. The Auxiliary was formed for the purposes of promoting the interests of the U. S. Marine Corps, the Marine Corps League and to protect and advance the welfare of Marines and their dependents. Auxiliary members participate in a wide variety of programs that benefit and preserve the fundamental rights and freedoms of every person of this Nation, young and old.
The Winnebago Unit assists the detachment with different fundraising events such as the Veterans Benefit and Ride, the PFC Brent Vroman Memorial Car and Motorcycle Show, and bingo on Friday nights. In addition we support the Dept. of Wisconsin MCLA Scholarship Fund, VA Hospitals, the Camo Quilt Project to name a few.
Regular membership in this Auxiliary shall be open to Wives, Widows, Mothers, Grandmothers, Sisters, Daughters, Granddaughters, Stepmothers, Stepdaughters, Daughters-in-Law, Aunts, Nieces, Mothers-in-Law and Sisters-in-Law of a Marine or a US Navy Corpsman currently serving or who has trained with the Marine FMF Units in excess of ninety (90) days and earned the Marine Corps Device or Warfare Device worn on the Service Ribbon authorized for FMF Corpsmen or a US Navy Chaplain, who has earned the FMF Badge, serving with Marines and, additionally, of some Korean War Era Marines who were ordered to active duty prior to completion of Recruit Training or Officers Training and subsequently received an Honorable Discharge prior to completion of ninety (90) days active or Reserve duty, eligible to belong to the Marine Corps League, Inc. (not less than sixteen  years of age) and Women Marines.
Dues are $25.00 the first year and $20.00 to renew. Life Memberships are available for those interested in becoming a life member of the Marine Corps League Auxiliary.
The auxiliary meets on the 3rd Tuesday of each month at 6:30 p.m. at the Marine Corps League Clubhouse located at 4715 Sherman Rd. in Oshkosh.