According to the map, which modern European nations had begun to form by 1000 CE?

The taught and the perspectives of the indigenous people, particularly those who lived in the past centuries, were able to survive the written forms than modern individuals. During the 1000 BC, Europe was not after anything as compared to today. Many countries did not exist during that period. However, the only state that was available was France, and it became the first one in Europe that was formed as it is known today.

Later other countries like Spain and England but did not have powers because they lived in the Anglo kingdoms.

By 1000 CE, Europe has not emerged out to be a strong and unique nation as how it is today. French Capetian Dynasty was the only kingdom which started to emerge between 1000 to 1400 CE.

Spain was under the control of Muslim Caliphates at that time.

Many tribal people of Germany who belonged to present day Denmark and Saxons from north Germany invaded Britain in 1000 CE. Roman rule of Britain disappeared gradually and what was remained was distributed among Anglo Saxons.