Preamble Drones have revolutionized modern warfare, offering precision strikes, reconnaissance, and logistical support with reduced risk to human operators. Their adoption has surged in recent conflicts, from the Nagorno-Karabakh war to the Russia-Ukraine war, proving their strategic value. This write-up examines: The role of drones in warfare Leading countries in drone deployment Technological and manufacturing leadership Comparative analysis of top drone companies Future outlook (next 5 years) Anti-submarine and high-altitude warfare applications India’s drone capabilities and imports Defense budgets and patent trends Programs of the U.S., China, Israel, Russia, and others 1. Drones in Modern Warfare: An Overview 1.1 How Drones Are Used in Warfare Drones serve multiple roles: Intelligence, Surveillance, and Reconnaissance (ISR): Real-time battlefield monitoring (e.g., U.S. MQ-9 Reaper)....