The defeats of the independent forces brought about the dissolution of a _junta_ which had taken charge of the government. At that time, Bolívar decided to intervene to help Perú gain her independence. He decided to send 3,000 men at once and to follow himself with 3,000 more to undertake this last part of his important work. As we have said, his decision in this matter was based, among other things, on the realization that the freedom of Colombia was in constant danger while the royalists occupied Perú. While making preparations for the campaign, he received news from Santander, the vice-president of Colombia, that the Spanish general, Morales, was advancing from Mérida to Cúcuta with a powerful army. He decided to send Sucre to Lima to handle the situation there and to go, himself, to Bogotá to defend his own country. He would have been unable to go to Lima immediately anyway, for he had not yet obtained permission from the Colombian government to do so. On his way to Bogotá he learned that the reports of the movements of Morales were very much exaggerated and that his forces were not so large as at first thought. Meanwhile, the Perúvians were insisting that Bolívar come to assist them, and the Constitutional Congress of Perú even instructed the President to ask the Libertador Presidente to inform his home government that the government of Perú ardently besought him to lend his assistance. Aware of the inefficient organization of the Peruvian forces, Bolívar strongly advised that attacks should not be made at once in order to see whether negotiations could bring about the desired results, or to allow time in which to improve the condition of the army. He argued that no movement should be made until it was certain that independence could be gained only through the success of arms. While Bolívar was still undecided, a powerful royalist army approached Lima, and the insurgents had to leave the capital and take shelter in the near-by port of Callao. Sucre, to whom the command of the united army had been offered, but who had not accepted this commission, directed the retreat. In Callao he assumed power, organized the insurgents of the city, and undertook other military operations. The royalists remained in Lima for a short while only, and then their opponents reoccupied the city.