All over the world.
No, Hinduism is quite more ancient than that. New researches prove that hinduism is at least 10000 years old. While popular belief states that it is more than a million year old.
Rome practiced Christianity in 600 CE
Many emperors of India during middle ages spread Hinduism Extensively. Mainly now there are organisations which spread Hinduism. But no one is forced to embrace Hinduism.
The spreading of Buddhismit spread to Nepal, Tibet, and China where it grew slowly alongside Chinese religions, by the ninth century, Buddhism was well established in China and spreading to neighboring countries, too!. It reached Korea in the fourth century, and then it spread to Thailand, Combodia, Malasya, and Caos, and by the sixth century it was established in Japan. By 600 CE in India, Buddhism spread to Japan, Siam, Burma, Annam, and Kapilavastu.
CE is what people more commonly call AD. It stands for "Common Era" but is no different from AD, time wise. So 600 CE is the same as 600 AD
Hinduism was studied by many European scholars. They published their findings about Hinduism and spread it themselves.
Indian merchants spread Hinduism to the Pacific and South East Asia in the first millennium. When the merchants settled in these regions, they brought priests who were instrumental in the spread of Hinduism.
3000 CE
Lisa!
600 CE was the zenith of their culture.
It is generally accepted as 600 BCE to 500 CE.
In 600 CE, areas such as Ireland, Scotland, and Scandinavia had largely Christian populations even though they had no significant Christian presence in 325 CE. These regions underwent widespread conversion to Christianity between 400-600 CE through missions and evangelization efforts.