 After the emergence of the Knights Templar, sizable battles flared up during the spring and summer months between the Knights Templar and La Familia.The organization has grown from a splinter group to a dominant force over La Familia, and at the end of 2011, following the arrest of José de Jesús "El Chango" Méndez Vargas, leader of La Familia, the cartel appeared to have taken over the bulk of La Familia's operations in Mexico and the U.S.In 2011 the Knights Templar appeared to have aligned with the Sinaloa Federation in an effort to root out the remnants of La Familia and to prevent Los Zetas from gaining a more substantial foothold in the Michoacán region of central Mexico.