Complex sentence: Meanwhile, two war councils took place on the Allied headquarters in Perú, the first one on November 6 when was decided that Bolivian President General Daza would take command of the army and lead it to Tana, where he would join with Buendía.
Split into simpler sentences: Meanwhile, two war councils took place on the Allied headquarters in Perú. In the first one, held on November 6, it was decided that Bolivian President General Daza would take command of the army and lead it to Tana, where he would join with Buendía.