Following World War I, France acquired a mandate over the northern portion of the former Ottoman Empire province of Syria. The French demarcated the region of Lebanon in 1920 and granted this area independence in 1943. Since independence the country has been marked by periods of political turmoil interspersed with prosperity built on its position as a regional center for finance and trade. The country's 1975-90 civil war that resulted in an estimated 120,000 fatalities, was followed by years of social and political instability. Sectarianism is a key element of Lebanese political life.