The 1971 war for the Liberation of Bangladesh was a landmark conflict in the history of South Asia. It dramatically changed the map of this region and marked a historical revival of Indian military power. In just 13 glorious and action packed days – three Indian corps sized spear heads raced for the capital city of Dacca.

Bangladesh is a country of paradoxes. The eighth most populous country of the world, it has attracted considerable attention from the international media and western policy-makers in recent years, often for the wrong reasons: corruption, natural disasters caused by its precarious geographical location, and volatile political situations with several military coups, following its independence from Pakistan in 1971. Institutional corruption, growing religious intolerance and Islamist militancy have reflected the weakness of the state and undermined its capacity.

In fiction, the spy is a glamorous figure whose secrets make or break peace, but, historically, has intelligence really been a vital step to military victories? In this breakthrough study, the preeminent war historian John Keegan goes to the heart of a series of important conflicts to develop a powerful argument about military intelligence.