For those who want more information on the April Uprising which started in Koprivshtitsa, here is a slightly condensed account from Wikipedia.
The April Uprising was an insurrection organised by the Bulgarians in the Ottoman Empire from April to May 1876, which indirectly resulted in the re-establishment of Bulgaria as an independent nation in 1878. The uprising was brutally crushed by the regular Ottoman Army and irregular units, leading to a public outcry in Europe and the United States, with many famous intellectuals condemning the Ottoman atrocities and supporting the oppressed Bulgarian population.
The 1876 uprising involved only parts of the Ottoman territories populated predominantly by Bulgarians. The emergence of Bulgarian national sentiments was closely related to the re-establishment of the independent Bulgarian church in 1870. Together with notions of romantic nationalism the rise of national awareness became known as the Bulgarian National Revival.
In November 1875, activists of the Bulgarian Revolutionary Central Committee met in the Romanian town of Giurgiu and decided that the political situation was suitable for a general uprising. The uprising was scheduled for April or May 1876.
On April 14, 1876, a general meeting was held in Oborishte to discuss the proclamation of the insurrection. One of the delegates, however, disclosed the plot to the Ottoman authorities. Ottoman police made an attempt to arrest the leader of the local revolutionary committee in Koprivshtitsa, Todor Kableshkov.
In conformity with the decisions taken at Oborishte, the local committee attacked the headquarters of the Ottoman police in the town and proclaimed the insurrection. Within several days, the rebellion spread to the whole Sredna Gora and to a number of towns and villages in the northwestern Rhodope Mountains. The insurrection broke out in the other revolutionary districts, as well, though on a much smaller scale.
The reaction of the Ottoman authorities was quick and ruthless. Detachments of regular and irregular Ottoman troops were mobilised and attacked the first insurgent towns as early as April 25th. By the middle of May, the insurrection was completely suppressed. One of the last sparks of resistance was poet Hristo Botev’s attempt to come to the rebels' rescue with a detachment of Bulgarian political emigrees resident in Romania, ending with the unit's rout and Botev's death. As few records were kept at the time, it is impossible to know exactly how many people were killed. The figure ranges from around 3,000 to over 12,000 with the latter being the generally accepted figure.
News of massacres of Bulgarians reached Istanbul in May and June 1876 through Bulgarian students at Robert College the American college in the city. Faculty members at Robert College wrote to the British Ambassador and to the Istanbul correspondents of The Times and the London Daily News.
An article about the massacres in the Daily News on June 23 provoked a question in Parliament about Britain's support for Turkey, and demands for an investigation. Prime Minister Benjamin Disraeli promised to conduct an investigation about what had really happened.
In July, the British Embassy in Istanbul sent a second secretary, Walter Baring, to Bulgaria to investigate the stories of atrocities. Baring did not speak Bulgarian and British policy was officially pro-Turkish, so the Bulgarian community in Istanbul feared he would not report the complete story. They asked the American Consul in Istanbul, Eugene Schuyler, to conduct his own investigation.
Schuyler set off for Bulgaria on July 23, four days after Baring. He was accompanied by a well-known American war correspondent, Januarius MacGahan, by a German correspondent, and by a Russian diplomat, Prince Aleksei Tseretelev.
Schuyler's group spent three weeks visiting Batak and other villages where massacres had taken place. Schuyler's official report, published in November 1876, said that fifty-eight villages in Bulgaria had been destroyed, five monasteries demolished, and fifteen thousand people in all massacred. The report was reprinted as a booklet and widely circulated in Europe.
Baring's report to the British government about the massacres was similar, but put the number of victims at about twelve thousand.
No other investigation of the massacres was made. A century later, one historian claimed that the number killed was exaggerated, and was closer to three thousand. But it is difficult to ignore the accounts of MacGahan, Schuyler and Baring, who visited the massacre sites three months after they occurred, and saw many of the unburied corpses. The actual number of victims will never be known.
MacGahan's vivid articles from Bulgaria moved British public opinion against Turkey. He described in particular what he had seen in the town of Batak, where five thousand of a total of seven thousand residents had been slaughtered, beheaded or burned alive by Turkish irregulars, and their bodies left in piles around the town square and the church. He described "Skulls with gray hair still attached to them, dark tresses which had once adorned the heads of maidens, the mutilated trunks of men, the rotting limbs of children..."
The political impact of the reports was immediate and dramatic. The leader of the British opposition, William Gladstone, wrote a booklet denouncing what he called "the Bulgarian Horrors," and calling upon Britain to withdraw its support for Turkey. "I entreat my countrymen," he wrote, "upon whom far more than upon any other people in Europe it depends, to require and to insist that our government, which has been working in one direction, shall work in the other, and shall apply all its vigour to concur with the states of Europe in obtaining the extinction of the Turkish executive power in Bulgaria. Let the Turks now carry away their abuses in the only possible manner, namely, by carrying off themselves...."
Prominent Europeans, including Charles, Darwin, Oscar Wilde, Victor Hugo and Giuseppe Garibaldi spoke against the Turkish behavior in Bulgaria. When Russia invaded Romania and Bulgaria in 1877, the Turkish Government asked Britain for help, but the British government refused, citing public outrage caused by the Bulgarian massacres as the reason.
The April uprising was a tragic failure as a revolution, but, thanks to publicity that was given to the reprisals that followed, it led directly to European demands for reform of the Ottoman Empire, and the Russo-Turkish War, 1877-78, , which ended in Turkish defeat, and the signing of the Treaty of San Stefano in March 1878, followed in July that year by the Treaty of Berlin. It thus ultimately achieved its original purpose, the liberation of Bulgaria from the Ottoman Empire.
“But let me tell you what we saw at Batak … The number of children killed in these massacres is something enormous. They were often spitted on bayonets, and we have several stories from eye-witnesses who saw the little babes carried about the streets, both here and at Olluk-Kni, on the points of bayonets. The reason is simple. When a Mohammedan has killed a certain number of infidels he is sure of Paradise, no matter what his sins may be … It was a heap of skulls, intermingled with bones from all parts of the human body, skeletons nearly entire and rotting, clothing, human hair and putrid flesh lying there in one foul heap, around which the grass was growing luxuriantly. It emitted a sickening odor, like that of a dead horse, and it was here that the dogs had been seeking a hasty repast when our untimely approach interrupted them … The ground is covered here with skeletons, to which are clinging articles of clothing and bits of putrid flesh. The air was heavy, with a faint, sickening odor, that grows stronger as we advance. It is beginning to be horrible.”
Eyewitness account of J. A. MacGahan on Turkish atrocities in Bulgaria in a letter to the London Daily News of August 22, 1876.