Warberg was born on 2 December 1845 in Värmdö Municipality, Sweden. He was commissioned as an officer in 1864 in 2nd Life Guards with the rank of underlöjtnant. Warberg attended the Royal Swedish Army Staff College in 1867 and was promoted to lieutenant the year after. In 1871 he was appointed general staff officer and was in 1874 appointed staff adjutant and lieutenant in the General Staff as well as to captain there in 1875. In 1877 he served a military attaché for six months in the Russian Army of the Danube during the Russo-Turkish War. Warberg was then stationed partly at the headquarters and partly in the 9th Army Corps. He attended the shelling and the battle of Nikopol fortress and the fortress's surrender in July. Furthermore, he was an attentive witness to the various afflictions at Plevna, Sgalevica and Pelisat as well as to the Siege of Plevna. Back in Sweden, Warberg served as chief of staff of the Life Guards Brigade from 1878 to 1881 and at the 4th Military District from 1881 to 1885. Warberg exerted an extensive teacher and military literary activity. He was thus 1873–1877 teacher in the art of war at the Military Academy Karlberg and also taught for some time regulations and the laws of war. In 1875, according to his assignment, he revised the Stridslära för arméns underbefälsskolor and in 1875–1877 left an account of the historical development of the Swedish Army Service Troops. In 1878–1884 he taught art of war and war history at the Artillery and Engineering College. After having become captain in the 2nd Life Guards in 1879, Warberg advanced in 1884 to chief adjutant and major in the General Staff. He then served as vice chief in the Military Office of the Ministry of Land Defence from 1886 to 1888 when he was promoted to lieutenant colonel in the General Staff. Warberg was head of the Military Office from 1888 to 1891. He was promoted to colonel in 1891 and was appointed regimental commander of the North Scanian Infantry Regiment. He was acting chief of the General Staff from 1895 to 1899, and in 1897, he was promoted to major general in the army. In 1899, Warberg was appointed commanding officer of the 6th Army Division. Six years later, in 1905, Warberg was appointed commanding officer of the 4th Army Division and was promoted to lieutenant general in the army. The same year, he was appointed Commandant General in Stockholm. From 1909 until his death a year later, he served as First Aide-de-Camp and Chief of the King's Staff. Warberg had also participated in the work of various committees. He was the secretary of the Swedish-Norwegian Committee for indication of proposals in the security service from 1879 to 1881, and after 1900–1901 having been heavily involved in the work for a new army order, Warberg was in 1903 the chairman of the committee for reviewing and reworking proposals for organizing the Landstorm.
Personal life
In 1874 he married Sophie Lagercrantz, the daughter of minister Gustaf Lagercrantz. Warberg and his wife are buried on Solna Cemetery. Warberg died on 16 October 1910 in Stockholm. He and his wife are buried at Solna Cemetery.
