see] - different clans from the east, north and northwest invaded Androy and put an end to the ruling dynasty of the Andriamañar - beginning of the development of what Mike Pearson et al. described as the "megalithic and monumental" Antandroy tombs 1769 - Introduced in Fort Dauphin during a settlement French attempt, spiny prickly pear cactus Opuntia dillenii spreads throughout the Androy region. 19th Century - Androy remained independent of the expanded Imerina Kingdom - further expansion of number of communities in Androy, especially near Faralambo where the Afomarolahy clan settled 20th Century 1901-1903 - French conquered Androy, though area remained in a State of Emergency due to continued Antandroy resistance to French rule 1917 - State of Emergency in Androy ended. 1924 - Introduction of a Cochineal insect Coccus cacti by Botanist H.Perrier de la Bâthie, in an attempt to ensure biological control of the invasive Opuntia dillenii cactus, called raketa gasy. Though cacti were beneficial - staple feed for human beings and cattle - it was getting difficult to save farmlands in order to grow crops. 1928 - Henry de Heaulme arrives in Fort Dauphin, having driven down from Tananarive in a Harley Davidson motorcycle with his wife and son in the side car. His intent was to export mica from Anosy and sisal from Androy through Fort Dauphin. This family also gets involved in conservation efforts and later also gets into the tourism business. 1928-29 - Destruction of Opuntia dillenii cactus by cochineal beetle (had been introduced near Toliary in 1925 and spread east, north and south at a rate of 100 km per year, leading to the death of somewhere between 10,000 and 100,000 cattle, turning the countryside gray and leading to extensive deforestation and emigration of Antandroy people. 1930-31 - Deadly famine, exacerbated by destruction of prickly pear cactus Opuntia dillenii by cochineal beetle. This cactus, previously introduced in Fort Dauphin, spread over Anosy and Androy regions:it had provided protection to herders and their cattle as well as both fruit and water to people and cattle. Eminent damages on local species of Castor oil plant are also observed . This resulted in half the population of in the Tsihombe district decreasing by half, though the number of dead versus those who emigrated out of the area is unclear. 1932 - Hosting the Opuntia cacti,a mite Dactylopius tomentosus is noticed. 1936 - Drought. Also, the