Francisco Solano Lopez 1827- 1870
One of the worst rulers of all time, young Francisco watched his father steadily build up Paraguay's military power, and became over-confident. Pausing briefly to marry Eliza Lynch (an Irish prostitute) he started making aggressive interventions in the war between Brazil and Uruguay, which resulted in him declaring war and invading Brazil in 1864. When Argentina refused to allow Paraguayan troops to move through their territory, Lopez declared war on them too. Finally the new Uruguayan puppet government declared war on Paraguay, which meant that Paraguay was at war with nearly all of its neighbours simultaneously, hopelessly outnumbered and out-gunned.
Within two years, suicidal attempts to invade Brazil and Argentina had shattered the Paraguayan army and the country was being invaded from all directions. Massacres and disease decimated the population. Frantic Paraguayan Generals tried to persuade Lopez to seek peace, but he refused to stop fighting and had them all executed (usually by having them tied to anthills to be eaten alive by the ants). When his 70 year old mother and two sisters tried to make him see reason, he had them all repeatedly beaten savagely and kept them nailed into wooden crates, from which they were only removed for further beatings. His two brothers and two brothers-in-law were executed.
Finally, and mercifully, Lopez was killed in battle. The War of the Triple Alliance caused the death of an estimated 80% of Paraguay's population, making it pro rata the bloodiest war ever. By the final days, the Paraguayan army consisted of children as young as six attacking enemy artillery placements with clods of earth.