from Wiki - in Rwanda, the genocide was well organized by the government -

The killing was well organized by the government. When it started, the Rwandan militia numbered around 30,000, or one militia member for every ten families. It was organized nationwide, with representatives in every neighborhood. Some militia members were able to acquire AK-47 assault rifles by completing requisition forms. Other weapons, such as grenades, required no paperwork and were widely distributed by the government. Many members of the Interahamwe and Impuzamugambi were armed only with machetes. Even after the 1993 peace agreement signed in Arusha, businessmen close to General Habyarimana imported 581,000 machetes from China for Hutu use in killing Tutsi, because machetes were cheaper than guns. In a 2000 news story, The Guardian reported, "The former Secretary-General of the United Nations, Boutros Boutros-Ghali, played a leading role in supplying weapons to the Hutu regime which carried out a campaign of genocide against the Tutsis in Rwanda in 1994. As Minister of Foreign Affairs in Egypt, Boutros-Ghali facilitated an arms deal in 1990, which was to result in $26 million (£18m) of mortar bombs, rocket launchers, grenades and ammunition being flown from Cairo to Rwanda. The arms were used by Hutus in attacks which led to up to a million deaths." Rwandan Prime Minister Jean Kambanda revealed in his testimony before the International Criminal Tribunal that the genocide was openly discussed in cabinet meetings and that "...one cabinet minister said she was personally in favor of getting rid of all Tutsi; without the Tutsi, she told ministers, all of Rwanda's problems would be over."

More quotes from Wiki on Rwandan Genocide

The assassination of Habyarimana in April 1994 set off a violent reaction, during which Hutu groups conducted mass killings of Tutsis (and also pro-peace Hutus, who were portrayed as "traitors" and "collaborators"). This genocide had been planned by members of the Hutu power group known as the Akazu, many of whom occupied positions at top levels of the national government; the genocide was supported and coordinated by the national government as well as by local military and civil officials and mass media. Alongside the military, primary responsibility for the killings themselves rests with two Hutu militias that had been organized for this purpose by political parties: the Interahamwe and Impuzamugambi, although once the genocide was underway a great number of Hutu civilians took part in the murders. Wikipedia cited below, accessed 11-6-2012

Population density as a factor in Rwandan, Burmese genocides --

At 408 inhabitants per square kilometre (1,060 /sq mi), Rwanda's population density is amongst the highest in Africa. Rwanda's population had increased from 1.6 million people in 1934 to 7.1 million in 1989, leading to competition for land. Historians such as Gérard Prunier believe that the 1994 genocide can be partly attributed to the population density.- - from Wiki cited. -- the Arakan Coastal Strip in Burma is also extremely narrow. We don't know the population density as we don't know the population, but it can I suppose be estimated from houses/huts and an average per household number, usually stated as 5, from satellite photos. kmk

A nightmare that could happen anywhere, including Burma - The Rwandan Genocide -

http://en.wikipedia.org/wiki/Rwandan_Genocide The Rwandan Genocide was the 1994 mass murder of an estimated 800,000 people in the East African state of Rwanda. Over the course of approximately 100 days (from the assassination of Juvénal Habyarimana and Cyprien Ntaryamira on April 6 through mid-July) over 500,000 people were killed, according to a Human Rights Watch estimate. Estimates of the death toll have ranged from 500,000–1,000,000, or as much as 20% of the country's total population. It was the culmination of longstanding ethnic competition and tensions between the minority Tutsi, who had controlled power for centuries, and the majority Hutu peoples, who had come to power in the rebellion of 1959–62. . . . Belgian colonialism played a role in maintaining the divide between the Tutsi and Hutu peoples. From Wikipedia article above.