2-270. All components of the Total Army (including Active, Reserve, National Guard, and Department of the Army [DA] civilians) bear responsibility for achieving the required levels of collective readiness. Each component has resident capabilities that enable the others, and as such must be trained to the same standard against peer threats. Units not training for specific missions focus on training for proficiency in large-scale combat operations. There are numerous implications across the warfighting functions that impact training, education, and priorities of effort, and they apply across all components. The scarcity of resources, particularly available time in the Army Reserve and Army National Guard, requires a clear prioritization of effort that is informed by the missions particular units perform during large-scale combat operations.