Emperor
Charles V then appointed
Blasco Núñez Vela as Peru's first viceroy in 1544. Núñez introduced the
New Laws, which were framed by
Bartolomé de las Casas to protect the
indigenous peoples. Many of the conquistadors living in Peru were against these laws since they could no longer exploit the natives. This prompted Gonzalo Pizarro and
Francisco de Carvajal to organize an army of followers with the intent of suppressing the New Laws. Many conquistadors turned against the Viceroy and joined Gonzalo's side, as his surname provided an effective rallying point. The rebel army defeated Núñez in 1546 at
Añaquito near
Quito. Although some, such as Carvajal, advised Gonzalo to proclaim himself King of Peru and to disown any further claim by the King of Spain to the land, Gonzalo refused.
Over the following months, however, the support for Gonzalo diminished when the King's new representative,
Pedro de la Gasca, arrived with the intention of offering pardon and repealing the New Laws. Most of Gonzalo's army deserted him just before the crucial battle at
Sacsayhuamán (in
Spanish Jaquijajuana), near
Cusco, that would determine the fate of the conquest. No longer supported with an army against the King's new representative, Gonzalo Pizarro surrendered and was
beheaded by the royal forces at field of battle, being the last of the Pizarro brothers to die a violent death (with Hernando dying of high age in Spain some three or six decades later).