This timeline shows 20th century genocide. timeline of 20th century genocide. 1915, armenian genocide. 1932, the beginning of ge
nocide in ukraine. 1933 to 1945, the holocaust occurred. 1937, parsley massacres dominican republic. 1975 to 1979, cambodian genocide. 1981, start of the mayan genocide in guatemala. 1994, rwandan genocide. 2003, beginning of genocide in darfur. what generalization can be made based on the information presented in the timeline? no major genocides occurred during the 1950s and 1960s. no major genocides occurred outside of europe. all genocides lasted for many years because they were difficult to stop. all genocides occurred before the end of the 20th century.