At the turn of the twentieth century, Alfred Thayer Mahan and Julian Stafford Corbett emerged as foundational thinkers on naval strategy and maritime power. Important in their lifetimes, their writings remain relevant in the contemporary environment. The significance of Corbett and Mahan to modern naval strategy seems beyond question, but too often their theories are simplified or used without a real understanding of their fundamental bases. Labeling a strategy, operation, or even a navy “Mahanian” or “Corbettian” tells very little.