The usual full dress uniform of the Chilean Army is based on twentieth-century German "feldgrau" uniforms; however, several units wear more colorful full dress uniforms. Cadets of the military academy "Bernardo O'Higgins Riquelme" wear a Prussian blue uniform with "Pickelhaube", based on the uniform worn by the Wilhelmine foot guard regiments. Some military units, including the Chacabuco and Rancagua regiments, wear a uniform from the War of the Pacific during parades, with kepis as headdress. The Buin regiment (2nd Army division in the Santiago Metropolitan region) has reintroduced the infantry regimental uniform of the Chilean War of Independence, having been formed in December 1810 as the 1st Infantry Regiment "Chilean Grenadiers", the original unit of the Chilean Army. The 1st Cavalry Regiment and the Krupp Artillery Battery of the 1st Artillery Regiment, both ceremonial units of the Army, have since 2012 worn the early twentieth-century Prussian-style full dress uniforms of the Army's cavalry and artillery branches.