From the Document: "As an operational concept, Multi-Domain Operations (MDO) influence what types of weapon systems and equipment the Army procures, what types and numbers of soldiers are needed, and what type of training is required-- significant legislative concerns for Congress. In this regard, an understanding of MDO could prove beneficial for congressional oversight activities. [...] According to the U.S. Army's Training and Doctrine Command (TRADOC): Multi-Domain Operations (MDO) describes how the U.S. Army, as part of the joint force [Army, Navy, Air Force, and Marines] can counter and defeat a near-peer adversary capable of contesting the U.S. in all domains [air, land, maritime, space, and cyberspace] in both competition and armed conflict. The concept describes how U.S. ground forces, as part of the joint and multinational team, deter adversaries and defeat highly capable near-peer enemies in the 2025-2050 timeframe. MDO provides commanders numerous options for executing simultaneous and sequential operations using surprise and the rapid and continuous integration of capabilities across all domains to present multiple dilemmas to an adversary in order to gain physical and psychological advantages and influence and control over the operational environment."
CRS In Focus, IF11409
Congressional Research Service: https://crsreports.congress.gov/