Germany

On January 18, 1871, Otto von Bismarck, the Minister-President of Prussia, unified independent German states into a nation-state.

Germanic tribes moved further south-west.They were ruled by the Saxons and Slavs.

India

 India became an independent nation in 1947 after a struggle for independence that was marked by non-violent resistance led by Mahatma Gandhi.

Buddha was central to the beginnings of recorded history in 

India.

 the southern peninsula was being ruled by the Cheras, the Cholas, and the Pandyas.

Iran

1 April 1979

Hinduism in Iran has a history stretching back to the Middle Ages.

ruled by the ancient Parthians and Sasanids.

Mexico 

declared independence September 16, 1810

 the oldest things in Mexico are stone tools that are 23,000 years ago. Its oldest people are the Aztec.

 Before they became independent they were captured by the Spanish Hernán Cortés he arrived at the port in Veracruz with ca. 500 conquistadores, and later moved on to the Aztec capital. On his search for gold and other riches, Cortés decided to invade and conquer the Aztec empire killing thousands of people. 

They were subjects to Spain.

Saudi Arabia 
has never been colonized, so the independence day is actually the day when the kingdom was created, which celebrated in 23 of September. Apart from a small number of urban trading settlements, such as Mecca and Medina, located in the Hejaz in the west of the Arabian Peninsula, most of what was to become Saudi Arabia was populated by nomadic tribal societies in the inhospitable desert. They have been subjects of another country. A communist party was formed in 1975