This United States Army manual, Training Circular TC 2-19.01 Military Intelligence (MI) Company and Platoon Reference Guide March 2021, is designed to combine key doctrinal discussions; detailed tactics, techniques, and procedures; key training concepts; field craft; and references for military intelligence (MI) companies and platoons. The principal audience for TC 2-19.01 is the MI company- and platoon-level leadership. Division and brigade commanders and staffs and trainers may also use this training circular (TC) as a reference. Commanders of MI companies serving in a joint role/capacity should also refer to applicable joint or multinational doctrine concerning the range of military operations and joint or multinational forces. TC 2-19.01 has 19 appendixes (meant as quick reference tools) of topics that require familiarization from MI company and platoon leaders. The topics include but are not limited to obstacle considerations, intelligence and electronic warfare (IEW) maintenance, casualty evacuation (CASEVAC), cover and concealment, and reports.