Sandoval was able to persuade Arana to join the coup in its final stages .
However , as the commander of the Guardia de Honor , Arana was in a position of substantial authority within the army .
Sandoval was able to persuade Arana to join the coup in Arana 's final stages .
However , as the commander of the Guardia de Honor , Arana was in a position of substantial authority within the army .