The volume narrates the final campaigns in the Iberian Peninsula and operations into southern France, chronicling sieges, blockades, and pitched engagements as opposing armies manoeuvre for strategic advantage. It examines coastal and Catalonian operations, assaults on fortified towns, attempts at relief and evacuation, and the ebb and flow of offensive and defensive movements. The author situates military actions within their political and command contexts, noting shifts in leadership and contentious decisions. Extensive supporting material is provided, including orders, morning states, maps, casualty returns, correspondence, and justificatory documents that illuminate disputed episodes and operational logistics.