Complex sentence: From there she visited Bilbao, where she enrolled in a ship, always through contacts with other Basques, reaching America's colonies and enlisting as a soldier under several captains, including her own brother, who never recognized her.
Split into simpler sentences: From there she visited Bilbao, where she enrolled on a ship with the assistance of other Basques. She served under several captains, suspposedly including her own brother, who never recognized her.