Defensive warfare is a military strategy focused on protecting a territory or position from enemy attacks. It involves fortifying defenses, using terrain advantages, and employing tactics that minimize risks while maximizing the effectiveness of available resources. The goal is to repel invaders and maintain control over a specific area. This approach often includes the use of fortifications, such as walls and trenches, and can involve guerrilla tactics to disrupt enemy movements. Historical examples include the Maginot Line in France and the Battle of Stalingrad during World War II, where defenders aimed to withstand and counteract enemy offensives.