Cuban War of Independence
AD – NPE: 0.2
According to the Wikipedia-article called “Cuban War of Independence” 0.3 million Cubans died in the war from 1895 to 1898 – “most of them civilian fatalities in the concentration camps”. Spain was an advanced democracy at the time. The Cuban revolutionaries later established an advanced democracy.The United States intervened militarily in what became the Spanish-American War.
Plausible estimates for the number of civilians killed by advanced democracies and democratic forces range from 0.15 to 0.25.