Impact on World History is not a good qualifier, it's too vague. So if you want a more precise answer you need a more precise question. What kind of impact? Culturally? Linguistically? Politically? And by world history do you mean still visible today?

Because a lot of states had impact on history, like a lot. China basically defined east Asian culture, the Mongol empire is responsible for a lot of Russian history, eastern Europe was hugely impacted by Germany, Austria and Russia. France had as much an impact as the British in the make up of Africa. So on, so on.