This publication, Training Circular TC 7-100.4 Hybrid Threat Force Structure Organization Guide June 2015, describes the Hybrid Threat Force Structure (HTFS) for training U.S. Army commanders, staffs, and units. It outlines a Hybrid Threat than can cover the entire spectrum of military and irregular capabilities against which the Army must train to ensure success in any future conflict. Applications for this series of TCs include field training, training simulations, and classroom instruction throughout the Army. All Army training venues should use a HTFS based on these TCs, except when mission rehearsal or contingency training requires maximum fidelity to a specific country-based threat or enemy. Even in the latter case, trainers should use appropriate parts of the Hybrid Threat TCs to fill information gaps in a manner consistent with what they do know about a specific threat or enemy.