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Due to the economical crisis in the lowmedieval age, the lords increased the tributes to th country men. The formens reacted against them causing a lot of conflicts.
This step was not enough to decrease ther crisis so the lords were forced to take part in the war.
The different lord families of vizcaya, joined among them by a complex union of parentage and lineages will divide in two main groups: The Oñacinos and the Gamboinos. In Orozko, between the XIII-XIV centuries, there was a castle, apertaining to the Abendaño family, which was joined to the Gamboino, used to defend from the fights.