Reinforcements Arrive – The Spanish Retreat Becomes …

Years: 1762 - 1762
June

Reinforcements Arrive – The Spanish Retreat Becomes Inevitable (Summer 1762)

As the Spanish invasion of Portugal faltered, the arrival of reinforcements in Oporto and Trás-os-Montes turned the tide against the Bourbon forces. The newly organized British-Portuguese troops, alongside militias and irregulars, strategically occupied key mountain passes and defiles, effectively cutting off Spanish withdrawal routes and sealing their fate.

The Spanish Retreat Becomes Inevitable

By mid-1762, the Spanish forces, which had once marched unopposed through Trás-os-Montes, now faced multiple obstacles:

  • Food shortages due to their own miscalculated supply strategy, compounded by guerrilla harassment from the local population.
  • Portuguese militias, Ordenanças, and reinforcements were now blocking their withdrawal routes, making retreat dangerous.
  • British and Portuguese regular forces, newly arrived, increased pressure on the demoralized Spanish army.

A Strategic Withdrawal Under Fire

With their supply lines collapsing and their positions becoming untenable, the Spanish began withdrawing from Portuguese territory. However, their retreat was far from orderly:

  • Portuguese forces harassed them along the way, inflicting further losses.
  • Many Spanish soldiers deserted, choosing to flee rather than continue the disastrous campaign.
  • Morale plummeted, as the invaders realized they had lost not to a superior army, but to a weakened Portugal that had outmaneuvered them.

Strategic Consequences of the Spanish Failure

  • The Spanish retreat from Trás-os-Montes was the final confirmation that the invasion had failed.
  • The Bourbon plan to force Portugal into the Family Compact collapsed, as King Joseph I and the Marquis of Pombal refused to negotiate from a position of weakness.
  • Britain had successfully kept Portugal in the war, forcing Spain and France into a humiliating withdrawal.
  • By the end of 1762, the Spanish occupation of Portugal was over, marking the end of Spain’s military ambitions in the region.

Conclusion – A Campaign of Blunders and Resistance

The 1762 invasion of Portugal, intended as a swift conquest, ended as a disastrous failure for the Bourbon alliance. Despite Portugal’s initial military weakness, the combination of:

  • Portuguese resilience
  • Guerrilla warfare
  • British military support
  • Spanish logistical failures

ensured that the invaders never achieved their objectives. The reinforcements sent to Oporto and Trás-os-Montes, arriving just in time, sealed Spain’s fate, forcing a disorderly retreat that would forever tarnish Spain’s military reputation in the Seven Years’ War.

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