Count John IV was a notable figure in the history of Portugal, known for his role during the Portuguese Restoration War. He was born in 1604 and became the Count of Almeida, a title that reflected his noble status and military leadership. As a military commander, John IV played a significant part in the efforts to restore Portuguese independence from Spanish rule. His contributions helped solidify the foundation for the eventual establishment of the House of Braganza, which would lead to the Portuguese throne.