India never invaded any country in her last 10000 years of history.
Algebra, trigonometry and calculus came from India; Quadratic equations were by Sridharacharya in the 11th Century;The largest numbers the Greeks and the Romans used were 10^6(10 to the power of 6) whereas Hindus used numbers as big as 10^53(10 to the power of 53) with specific names as early as 5000 BCE during the Vedic period. Even today, the largest used number is Tera 10^12(10 to the power of 12).
Sanskrit is the mother of all the European languages. Sanskrit is the most suitable language for computer software, reported in Forbes magazine, July 1987.
http://www.cs.colostate.edu/~ggupta/india.html:source for above facts.