An oil embargo is a political instrument where a country restricts or prohibits the export of oil to another nation. This tactic is often employed to exert economic pressure or express disapproval of certain policies or actions, such as military interventions or human rights violations. The political implications can include strained diplomatic relations, economic hardship for the targeted nation, and potential shifts in global energy markets. By disrupting oil supplies, an embargo can impact national security and economic stability, often leading to international dialogue or conflict resolution efforts.