**Defense Strategy** refers to a set of actions and approaches taken to protect a competitive position, minimize risks, and safeguard resources and market share. In military terms, it involves planning and activities to deter, resist, and repel strategic offensives. In marketing, it focuses on retaining valuable customers by weakening competitors' products and highlighting potential risks. In business management, it involves maintaining a stable market position through strategies like sustaining core value propositions, scaling infrastructure, and safeguarding against harm.