 Complete the following phrase:  Shortly thereafter the 225th Mixed Brigade was reorganized in Libros, by the Turia River, within the 64th Division of the XIX Army Corps. The brigades new commander was Militia Major Juan Serrano Jiménez, for its former commander Sáenz de San Pedro was promoted to the command of the 64th Division. The 225th Mixed Brigade was sent to defend the western end of the Eastern Front, where there was a lull in the battles against the rebels, until 25 July when the Spanish Republican strategic operations saw a shift with the onset of the 