A group of over 100 islands in the southern atlantic

Answer: Malvinas Islands or Falkland Islands

The Malvinas Islands (Falkland Islands) is an archipelago with more than 200 islands, located in the southwestern Atlantic Ocean, in the extreme southeast of South America, near Argentina.

According to the United Nations, it is a British overseas territory, that is, a non-autonomous territory whose administrative power is the United Kingdom and whose sovereignty is claimed by Argentina.