Conflicts 1949-2012 with at least 10,000 fatalities. 

1. 40,000,000 Red China, 1949-76 (outright killing, manmade famine, Gulag, Muslim Uighurs)
2. 10,000,000 Late Stalinism, 1950-53; Post-Stalinism, to 1987 (mostly Gulag), more than 100.000 Muslims in Chechnya
3. 5,800,000   Zaire (Congo-Kinshasa): 1967-68; 1977-78; 1992-95; 1998-today
4. 4,000,000   Ethiopia, 1962-92: Communists, artificial hunger, genocides
5. 2,800,000   Korean war, 1950-53
6. 2,200,000   Sudan, 1955-72; 1983-2006 (civil wars, genocides); Dafur to today
7. 1,870,000   Cambodia: Khmer Rouge 1975-79; civil war 1978-91
8. 1,800,000   Vietnam War, 1954-75 (more than 90% Vietnamese, Allies)
9. 1,800,000   Afghanistan: Soviet and internecine killings, Taliban 1980-2001
10. 1,250,000   West Pakistan massacres in East Pakistan (Bangladesh 1971)
11. 1,100,000   Nigeria, 1966-79 (Biafra); 1993-today
12. 1,100,000   Mozambique, 1964-70 (30,000) + after retreat of Portugal 1976-92
13. 1,000,000   Iran-Iraq-War, 1980-88
14.   900,000   Rwanda genocide, 1994
15.   875,000   Algeria: war with France 1954-62 (675,000); Islamists/Government 1991-2006 (200,000)
16.   850,000   Uganda, 1971-79; 1981-85; 1994-today
17.   650,000   Indonesia: Marxists 1965-66 (450,000); East Timor, Papua, Aceh etc, 1969-today (200,000)
18.   580,000   Angola: war against Portugal 1961-72 (80,000); after Portugal’s retreat (1972-2002)
19.   500,000   Brazil against its Indians, up to 1999
20.   430,000   Vietnam, after the war ended in 1975 (own people; boat refugees)
21.   400,000   France in Indochina, 1945-54
22.   400,000   Burundi, 1959-today (Tutsi/Hutu)
23.   400,000   Somalia, 1991-today
24.   400,000   North Korea up to 2006 (own people)
25.   300,000   Kurds in Iraq, Iran, Turkey, 1980s-1990s
26.   300,000   Iraq, 1970-2003 (Saddam against minorities)
27.   240,000   Columbia, 1946-58; 1964-today
28.   200,000   Yugoslavia, Tito regime, 1944-80
29.   200,000   Guatemala, 1960-96
30.   190,000   Laos, 1975-90
31.   175,000   Serbia>Croatia, Bosnia-Herzegovina, Kosovo, 1991-1999
32.   150,000   Romania, 1949-99 (own people)
33.   150,000   Liberia, 1989-97
34.   140,000   Chechnya, 1994-today in independence war against Russia
35.   150,000   Lebanon civil war, 1975-90
36.   140,000   Kuwait War, 1990-91 (Arabs from Iraq and Kuwait, Allies)
37.   130,000   Philippines: 1946-54 (10,000); 1972-today (Muslim Marxists, 120,000)
38.   130,000   Burma/Myanmar, 1948-today
39.   100,000   North Yemen, 1962-70
40.   100,000   Sierra Leone, 1991-today
41.   100,000   Albania, 1945-91 (own people)
42.     80,000   Iran, 1978-79 (revolution)
43.     75,000   Iraq, 2003-today (domestic)
44.     75,000   El Salvador, 1975-92
45.     70,000   Eritrea/Ethiopia, 1998-2000
46.     68,000   Sri Lanka 1997-today    
47.     60,000   Zimbabwe, 1966-79; 1980-today
48.     60,000   Nicaragua, 1972-91 (Marxists/natives etc,)
49.     54,000   Arab wars against Israel, 1948-today (excluding the Israel-Palestine conflict; see 71); 44.000 Arabs; 10.000 Israelis
50.     50,000   Communist North Vietnam, 1954-75 (own people)
51.     50,000   Tajikistan, 1992-96 (secularists against Islamists)
52.     50,000   Equatorial Guinea, 1969-79
53.     50,000   Peru, 1980-2000
54.     50,000   Guinea, 1958-84
55.     40,000   Chad, 1982-90
56.     37.000   Syria 2011-2012
57.     33,000   Libya 2012-2012
58.     30,000   Bulgaria, 1948-89 (own people)
59.     30,000   Rhodesia, 1972-79
60.     30,000   Argentina, 1976-83 (own people)
61.     27,000   Hungary, 1948-89 (own people)
62.     26,000   Kashmir independence, 1989-today
63.     25,000   Jordan government vs. Palestinians, 1970-71 (Black September)
64.     22,000   Poland, 1948-89 (own people)
65.     20,000   Syria, 1982 (against Islamists in Hama)
66.     20,000   Chinese-Vietnamese war, 1979
67.     18,000   Congo Republic, 1997-99
68.     19,000   Morocco: war against France, 1953-56 (3,000), Western Sahara, 1975-today (16,000)
69.     15,000   “Tens of thousands of casualties and displaced” (Le Monde, 06-10-09). Yemen government against Huthi rebels.
70.     14,000   Nigeria 2000 - 2010 (Muslims, Christians)
71.  13,600   Israel-Palestinian conflict 1947-87 (5,000); 1987-91 (2,000); 2000-2012 (6,200: 80% Arabs, 20% Jews)
72.      10,000   South Yemen,  summer 1986 (civil war)

Sources: Brzezinski, Z., Out of Control: Global Turmoil on the Eve of the Twenty-first Century, 1993.
Courtois, S., ed., Le Livre Noir du Communism, 1997.
Heinsohn, G., Lexikon der Völkermorde, 1999.
Heinsohn, G., Söhne und Weltmacht, 2006, 8th ed. 
Rummel. R., Death by Government, 1994. Small, M.,
Singer, J.D., Resort to Arms: International and Civil Wars 1816-1980, 1982.
Twentieth Century Atlas (M.White), http://users.erols.com/mwhite28/warstat8.htm, 2010