Annual Membership Join the Mt. Soledad National Veterans Memorial. Your tax-deductible membership is of great importance to the operation of the Memorial. Membership funds are used to clean and re-etch the plaques every four to six years, as well as the keeping the walkways, landscaping and plaque walls in top condition. Most importantly, you are helping to pay tribute to veterans on the Memorial Walls who have helped preserve the freedoms we enjoy as Americans.