In 1907 a military reform was carried out by President Rafael Reyes Prieto right in the aftermath of the Thousand Days War which had devastated the country economically and morally. The ministry of war hired a Chilean military mission to advise the ministry on how to professionalize the army. This led to the creation of the Colombian Military School in June 1907. The Army was then dramatically reorganized under the guise of the Chilean military mission, the Chilean army which had adopted Prussian military doctrine and uniforms since 1886 did the same to the Colombian army as Colombian troops began using Prussian military uniforms and doctrine, which is still present today in the Colombian Military Academy with ceremonial uniforms being of Prussian influence and the use of Pickelhaube helmets. The Chileans reorganized the Colombian Army into Divisions made up of a divisional HQ, 3 Infantry regiments,1 Artillery regiment, and 1 Cavalry regiment each, meanwhile, military engineers were grouped with the Infantry regiments. This military reform allowed the Colombian army to become professionalized and a truly National army was established. The army remained under the influence of the Chilean military mission until the mission left in 1914. Colombia remained neutral during World War 1 but did watch how the conflict progressed and sent military attachés to Europe after the war to study new technological advancements in aviation, infantry, cavalry, engineering and training methods.