The hero is Matthew Dodd, a rifleman in the 95th Regiment of Foot of the British Army. The novel takes place in Portugal early in the Peninsular War. The British had sent a small force of about 10,000 men to the aid of her ally, Portugal. Rather than face the overwhelming numbers of the opposing French forces under Marshal André Masséna, the British commander, Lord Wellington, secretly constructed the Lines of Torres Vedras and withdrew behind them, leaving the French force no options but to lay siege to the lines, or retreat. For three months the French encamped outside the lines, waiting for reinforcements from the other side of the Tagus River, but in the end hunger and disease forced them to retreat.