The Beiras Campaign refers to a series of military actions during the Christian Reconquista in the Iberian Peninsula, particularly in the region known as the Beiras (comprising the modern-day regions of Beira Alta and Beira Baixa in central Portugal). This region, strategically located between the northern Christian kingdoms and the Muslim-controlled south, became a focal point of military campaigns aimed at expanding Christian territory.

The Beiras Campaigns primarily unfolded during the 11th and 12th centuries, as the Christian forces of the Kingdom of León and later the emerging Kingdom of Portugal sought to reclaim and consolidate territory from Muslim rule. The campaign is significant in the broader context of the Reconquista and the formation of the Portuguese nation. Here’s an overview of the key events and significance of the Beiras Campaign: