The Department of Defense Death Gratuity

The Department of Defense is an executive branch department of the federal government of the United States charged with coordinating and supervising all agencies and functions of the government concerned directly with national security and the United States Armed Forces. The amount of death gratuity is $100,000 and is tax-exempt.The death gratuity will normally be paid to the eligible beneficiaries within seventy-two hours of notification.

Source: http://militarypay.defense.gov/Benefits/DeathGratuity.aspx