Other acts of violence, such as war, torture, and ethnic cleansing not aimed at religion in particular, may nevertheless take on the qualities of religious persecution when one or more of the parties involved are characterized by religious homogeneity; an example being when conflicting populations that belong to different ethnic groups often also belong to different religions or denominations. The difference between religious and ethnic identity might sometimes be obscure (see Ethnoreligious); cases of genocide in the 20th century cannot be explained in full by citing religious differences. Still, cases such as the Greek genocide, the Armenian Genocide, and the Assyrian Genocide are sometimes seen as religious persecution and blur the lines between ethnic and religious violence.