genocide - n. the deliberate killing of people who belong to a particular racial, political or cultural group

erase –v. to remove any thought or memory of (something)

region –n. a part of a country, of the world, etc., that is different or separate from other parts in some way

challenge –n. a difficult task or problem: something that is hard to do

ashamed –adj. feeling shame or guilt

armed to the teeth – idiom. a way of saying having a lot of weapons or military supplies