The Senior Citizens League (TSCL) was first established as a special project of TREA: The Enlisted Association (TREA). On January 1, 1995, TSCL became an independent 501[c][4] citizens' action organization.

The League’s mission is to promote and assist members and supporters, to educate and alert senior citizens about their rights and freedoms as U.S. Citizens, and to protect and defend the benefits senior citizens have earned and paid for. TSCL consists of vocally active senior citizens who are concerned about the protection of their Social Security, Medicare, and veteran or military retiree benefits.
TSCL is governed by an all volunteer, unpaid Board of Trustees.  The Chairman and five Trustees devote an extraordinary amount of time to the League.  All Board members are retired military, veteran’s and advocates for issues that concern today’s aging population.

The TSCL Staff are all dedicated to helping seniors. They work diligently to provide the following services that are considered primary and essential to the betterment of the quality of life of our nation's senior citizens:

Distribution of public awareness and educational materials,
Dissemination of information concerning legislation before Congress,
Enlistment of senior citizens in grass-roots lobbying campaigns on issues affecting retirees (civilian and military)
Ensuring that governmental bodies live up to any commitment made to senior citizens.

To pursue its goals, TSCL distributes a newsletter (The Social Security & Medicare Advisor) ten times a year to approximately 150,000 of the most active supporters and to all Members of Congress, and has sent out more than one and a half million books and pamphlets, such as; In Defense of Earned Benefits, and The Senior Activist's Survival Manual.
TSCL is registered to conduct grassroots fundraising, public education and lobbying activities in nearly every state, and offers its supporters an unconditional refund of their most recent contribution if they are dissatisfied with TSCL's positions or performance. Unlike many other organizations, no government moneys are accepted or used by TSCL.