Why Portugal’s 1762 'Fantastic War' was actually a phantom conflict of starvation and shadows
The Fantastic War was a bizarre theatre of the Seven Years' War where Portugal repelled a massive Franco-Spanish invasion without a single major pitched battle. By weaponizing scorched-earth tactics and relentless guerrilla ambushes, the Portuguese starved their invaders into a humiliating retreat, turning a military catastrophe into a strategic phantom.
In 1762, Spain, under King Charles III, invaded Portugal to create a diversion for France against Great Britain. Portugal, still reeling from the devastating 1755 Lisbon earthquake, was ill-prepared for war. Prime Minister Sebastião José de Carvalho e Melo, the Marquis of Pombal, had largely neglected the military to focus on national reconstruction. Despite this vulnerability, the invading Franco-Spanish army of approximately 42,000 men faced a brutal reality: the Portuguese population refused to engage in conventional warfare.
Instead, the Portuguese employed a sophisticated strategy of attrition. Peasants abandoned their villages, taking or destroying all food supplies, while guerrillas relentlessly harassed supply lines. The Anglo-Portuguese army, led by the Count of Lippe, utilized the mountainous terrain near Abrantes to block the invaders' path to Lisbon. Faced with starvation and constant ambushes, the Franco-Spanish forces suffered massive losses. Contemporaneous sources, such as Charles François Dumouriez, estimated total casualties at 15,000 for the second invasion alone, with British minister Edward Hay suggesting 30,000 total deaths across both campaigns.
The conflict ended in 1763 with the Treaty of Paris, restoring the status quo. While Spain achieved tactical successes in South America, capturing Colonia do Sacramento, these gains were largely negated by the peace negotiations. The 'Fantastic War' remains a testament to how a smaller, resource-depleted nation can neutralize a superior force by refusing to play by the rules of traditional combat, effectively turning the landscape itself into an insurmountable enemy.
Source: Fantastic War
