 Complete the following phrase:  Belgrano decided to leave nothing available for the enemy to use as supplies, he used scorched earth tactics, during the so-called Jujuy Exodus Exodo Jujeño, ordering the civilian population to move out of the city and into the countryside along with the army, and to burn everything left behind to hinder the enemys advance. The retreat was orderly, with Díaz Vélezs troops protecting the rearguard. On 3 September he made contact with the enemy, whose advanced elements had chased the cavalry to the Las Piedras river. Taking advantage of the terrain, and with Holmbergs help, Belgrano opened fire with his new artillery and turned the tables on the enemy, taking the leader of the royalist advance, Colonel Huici, prisoner. Ten days later, they encamped in Tucumán, where they decided to end the retreat. On the 24th they confronted Tristán at the 