I have often seen pictures of Hindu gods carrying what looks like a rotating disk (“chakra”) and always used to wonder what it was and how it was used as a weapon — I have heard stories about Krishna using the Sudarshan Chakra to smite the head off enemies’ shoulders.
Finally, I did some research and found a lot of material on Chakra — the “ring of gods”. Its first-ever mention occured in Mahabharat and apparently it was a very common weapon in ancient times used by Gods and kings alike. It was a very popular weapon with the Sikh infantry too while fighting Muslim armies — there are pictures of Sikh Gurus wearing chakras around their turbans. The Chakrams could be thrown as far as 100 meters into the enemy ranks!
The most iconic method of throwing a chakram is tajani, wherein the weapon is twirled on the index finger of an upraised hand and thrown with a timed flick of the wrist. The spin is meant to add power and range to the throw, while also avoiding the risk of cutting oneself on the sharp outer edge. Trained exponents can twirl the chakram while using another weapon with their free hand. The use of tajani in battle was perfected by the Nihang who employed a particular formation to protect the chakram-wielder from harm. Although variants of the chakram would make their way to neighbouring parts of the region, the tajani technique remained unique to Indian martial arts.
Amazingly, Wikipedia tells us that the Chakri Dynasty, the current ruling house of Thailand, is named after the weapon!
See this excellent video by Discovery channel on “Chakram” as a weapon.