On 22 April 2025, a peaceful morning in Pahalgam was shattered by one of the deadliest terrorist attacks in recent Indian history. What followed was not merely a military response but a decisive campaign that reshaped India's approach to cross-border terrorism. In Operation Sindoor: The Untold Story, Major Madhan Kumar (Retd)-a former Indian Army officer and geopolitical analyst-takes readers beyond the headlines to reveal the planning, intelligence, strategy, and execution behind India's precision strikes on terrorist infrastructure in Pakistan and Pakistan-Occupied Jammu and Kashmir. Drawing on operational insight, strategic analysis, and extensive research, he reconstructs the events that unfolded from the Pahalgam massacre to Operation Sindoor, the military escalation that followed, and the strategic lessons that continue to shape India's national security doctrine. More than a military history, this is a tribute to the soldiers, intelligence professionals, security personnel, and ordinary Kashmiris whose courage stood against terror. It is a story of sacrifice, precision, and resolve, showing how a nation confronted one of its gravest security challenges with clarity of purpose and unwavering determination. Operation Sindoor is an authoritative account of a defining moment in modern India. It reveals the strategy behind the strikes, the courage behind the uniform, and the enduring cost of defending a nation.