Complex sentence: Mubarak acted as commander of the newly formed Kuwaiti Armed Forces for two years, and was then promoted to Major General and designated Kuwait's first Chief of Staff of the Armed Forces in March 1963, reporting for the first time to a Kuwaiti Minister of Defense.
Split into simpler sentences: Mubarak acted as commander of the newly formed Kuwaiti Armed Forces for two years. Later he was promoted to Major General and designated Kuwait's first Chief of Staff of the Armed Forces in March 1963, reporting for the first time to a Kuwaiti Minister of Defense.