Passage: The antelope is native to and found mainly in India, while it is extinct in Bangladesh. Formerly widespread, only small, scattered herds are seen today, largely confined to protected areas. During the 20th century, blackbuck numbers declined sharply due to excessive hunting, deforestation, and habitat degradation. The blackbuck has been introduced in Argentina and the United States. In India, hunting of blackbuck is prohibited under Schedule I of the Wildlife Protection Act of 1972. The blackbuck has significance in Hinduism; Indian and Nepali villagers do not harm the antelope.

Question: What countries was the blackbuck introduced to?
Argentina and the United States