Which of the following groups did not invade northern europe? ottomans celts vikings romans (i believe that it is either ottomans or celts)

ANSWER:

The Ottomans did not invade Northern Europe. They conquered and controlled much of North Africa, Western Asia, and Southern Europe starting from the 14th century to the early 20th century.

EXPLANATION:

The Ottoman Empire, commonly referred to as the Turkish Empire was established at the end of the 14th century by the Osman, who was the 1st tribal leader of the Oghuz Turkish. They then crossed to Europe and started their conquest into the Balkans. The capital of the empire was Constantinople and the empire acted as the middle ground between the eastern and western half of the world.