Military Survivor Benefit Plan: Background and Issues for Congress [Updated January 15, 2020] [open pdf - 1MB]
From the Introduction: "This report describes the categories of beneficiaries eligible for survivor benefits under the military Survivor Benefit Plan (SBP), the formulas used in computing the income level (including the integration of SBP benefits with other federal benefits), and the costs of SBP participation incurred by the retiree and/or the beneficiary. While this report focuses primarily on SBP, survivors of military members may be eligible for other benefits, including life insurance, TRICARE health benefits, Annuity for Certain Military Surviving Spouses (ACMSS), the Minimum Income Widow Annuity, Department of Defense (DOD) death gratuity, commissary and exchange privileges, and other federal benefits, such as Social Security."
CRS Report for Congress, R45325
Congressional Research Service: https://crsreports.congress.gov/