Грамматика и Лексика

Преобразуйте, если это необходимо, слово MUCH так, чтобы оно грамматически соответствовало содержанию текста.

Do you know that Britain was part of the Roman Empire for over three and a half centuries? From the invasion in AD 43 until rule from Rome ended in the 5th century, the province of Britannia was part of a political union that covered ____________ of Europe.