He fought and wounded Captain Balduino Enrico (Boudewijn Hendricksz) who was ordered by the Dutch Government to capture Puerto Rico.

Amezqueta (birth name: Juan de Amézqueta y Quijano[note 1]) was born and raised in the town of San Sebastián, Gipuzkoa Province, Spain.

The Dutch wanted to establish a military stronghold in the area, and dispatched Captain Balduino Enrico (also known as Boudewijn Hendricksz or Bowdoin Henrick) to capture Puerto Rico.

The Dutch were counterattacked by Captain Juan de Amezqueta and 50 members of the civilian militia on land and by the cannons of the Spanish troops in El Morro Castle.

The land battle left 60 Dutch soldiers dead and Enrico with a sword wound to his neck which he received from the hands of Amezqueta, who was considered one of the best swordsmen on the island.

Captains Amezqueta and Andre Botello decided to put a stop to the destruction and led 200 men in an attack against the enemy's front and rear guard.