The Anglo-Portuguese Treaty refers to a series of agreements between the Kingdom of England and the Kingdom of Portugal, aimed at establishing mutual support and cooperation. The most notable treaty was signed in 1373, marking the beginning of a long-standing alliance that included military and trade agreements. This treaty helped solidify Portugal's position in global trade and provided England with a reliable ally during various conflicts. Over the centuries, the alliance was reaffirmed through additional treaties, including the Treaty of Windsor in 1386. This enduring partnership played a significant role in both nations' histories, influencing their colonial ambitions and diplomatic relations, particularly during the Age of Exploration.