Book excerpt: SMFLS5:The Sustainment & Multifunctional Logistics SMARTbook (Guide to Operational & Tactical Level Sustainment) has been completely updated for 2021. At 368 pages, SMFLS5 topics and references include the sustainment warfighting function (ADP 4-0); sustainment operations (FM 4-0), sustainment execution (logistics, financial management, personnel services, & health services support); sustainment planning; brigade support (ATP 4-90, Brigade Support Bn); division, corps & field army sustainment (ATP 4-93, Sustainment Brigade); theater support (ATP 4-94, Theater Support Command); joint logistics (JP 4-0); and deployment & redeployment (ATP/JP 3-35), and more than a dozen new/updated Army sustainment references.