The first human inhabitants of Nosy Be were small bands of Antankarana and Zafinofotsy, before the Sakalava people migrated there and became the most numerous ethnic group on the island. These people were joined later by some Comorians, Indians or Antandroy. Nosy Be made first major appearance in Madagascar's history when King Radama I announced that he intended to conquer the whole west of Madagascar. That plan was eventually achieved in 1837 when the Sakalava Kingdom of Boina came into the possession of Ranavalona I upon the defeat of Queen Tsiomeko's army.[citation needed]

The French colonized the island from 1840, founding an outpost named Hell-Ville (from French Admiral de Hell).[1] The 1848 abolition of slavery in the French colonies resulted in a revolt against the French by the Sakalava people, who were extensively involved in the slave trade.[2] In the late 19th and early 20th centuries, the island was governed by the French as an internal protectorate within the colony of Madagascar. The outpost became an important trade harbor in the Mozambique channel.[3] During the nineteenth century, the French settlers developed cash crop agriculture (mainly sugar cane) and recruited indentured laborers from East Africa.[4] Though it was difficult for the French to control the littoral, they founded a plantation colony in Nosy Be, mainly producing sugar and cash crops.[5] The French used both military force and diplomacy to maintain their position in the island, appointing the former ruler of Nosy Be Binao as the gouverneur principal of the island.[6]

During the Russo-Japanese War Nosy Be became a supply station for Russia's Second Pacific Squadron. The main fleet led by Admiral Zinovy Rozhestvensky reached Nosy Be on January 9, 1905, where it met a smaller detachment led by Admiral Dmitry von Fölkersam that had arrived already on December 28, 1904.[7] The fleet stayed for two months for refurbishing and coaling, leaving on March 17 to meet its fate ten weeks later at the Battle of Tsushima.[8]

The island, like most of Madagascar, suffers from an extreme level of uncertainty linked to crime and violence. Rumours quickly turn into accusations in Madagascar, and lynchings are common, even for allegations related to traffic accidents or theft. On October 3, 2013, the body of an 8-year-old boy was discovered at the beach of Ambatoloaka on the island. The condition of the body was poor after one week in the water, and a rumour was spread that the child had been murdered by Western organ-trafficking tourists. The uncle of the boy, a local named Zaidou, was detained by the local police for questioning, but a violent mob gathered to storm the local jail to punish the supposed murderer.[9]

As the uncle was not found, the anger of the mob turned to the Westerners having been in contact with the person, French tourists Sébastien Judalet and Roberto Gianfalla. Judalet was found and dragged from his hotel to the beach of Ambatoloaka, where the large mob repeatedly hit him with sticks and stones. The police received at least five calls from bystanders or expatriates but did not respond. Two police officers actually joined the mob, one of which who was filming the lynching on his smartphone.[10] After three hours of torture and humiliation, the naked and bleeding tourists were put into car tires and thrown alive into a bonfire on the beach.[9] On the afternoon of October 3, 2013, the uncle Zaidou was found driving on the island. A mob of several hundred quickly lynched him by burning him alive on a public street next to a mosque.

Both events were filmed by the bystanders, publishing the murders on the internet. In spite of this mass of evidence, the local justice took two years of investigation to finally convict 4 members of the mob to lifetime imprisonment and 6 others to shorter sentences; 26 suspects in custody were released without charge as well as the two police officers.[11] A local politician, Joseph Yoland, was accused of inciting the killings on his radio station at the island, but the charges were dropped when the court allegedly was unable to retrieve any recordings of the aired shows that evening.[12] Following the events, the French authorities warned travellers for "high risk of assaults, that could be extremely violent",[13] U.S. travellers are also advised "[to] be aware of the potential for mob violence and ‘popular justice’ that is sometimes directed towards foreign nationals.".[14] The lynching in Nosy Be is a rare public murder of expatriates in Madagascar; most lynchings concern locals. However, expatriates are frequently subject to kidnapping and extortion, such as the January 2015 kidnapping of a 12-year old French child outside of his school,[15] and two separate kidnappings of French citizens of Indo-Pakistani origin in April 2016 that triggered the intervention of the French police tactical unit GIGN in Madagascar.[16]