Marine Corps commanders and staffs at all levels should read, study, and be thoroughly conversant with the content of MCPD 1-0. The notion that "words matter," is embedded throughout this publication, which defines key terms to ensure Marines speak a common operational language. Inasmuch as MCPD 1-0 illustrates how the flexibility and rapid deploy ability of our task-organized, combined arms forces apply across the range of military operations, joint and multinational force commanders and their staffs can also use this publication to better understand Marine Corps capabilities and considerations for their employment.