Which tenet emphasizes the breadth and depth of operations across space and time?

• A. Agility
• B. Convergence
• C. Endurance
• D. Depth

Answer: (D)

Depth focuses on sustaining logistics across the entire battlespace over time, not just near the front. It captures both breadth and depth: breadth means presence across a wide geographic area, and depth means layered, multi-echelon sustainment that supports operations as they move and evolve. In practice, depth involves forward distribution nodes, prepositioned stocks, and redundant routes so support can reach units wherever they operate and whenever they need it. Agility is about speed and adaptability, Convergence is about aligning capabilities, and Endurance is about lasting power over time, but the phrase in question pairs most directly with the comprehensive, layered sustainment that depth embodies.