"Sixth-Order" refers to a classification in various fields, often indicating a level of complexity or hierarchy. In mathematics, it can describe equations or systems that involve sixth-degree polynomials, which have terms raised to the sixth power. This level of order can also apply to systems in physics or engineering, where interactions or behaviors are analyzed at a sixth level of complexity. In the context of military strategy, "Sixth-Order" may refer to advanced planning and operational tactics that consider multiple layers of variables and outcomes. This term can also be relevant in game theory, where strategies are developed based on predictions of opponents' moves, extending to six levels of reasoning.