In the latest DISCOVER magazine there is an article about Leishmaniasis, a nasty protozoan
infection transmitted by bite of sand flies. It was first described by a Scottish army phsician
in Dum Dum india in 1903, and was first called Dum Dum fever.

In WWI, both sides accused the other of using "dum-dum" bullets, which were ordinary bullets
with a cross cut in nose to make bullet expand making larger than normal wound.

It was believed they were used in Ireland in 1971,
in article in GUARDIAN for Dec. 6, 2001:
"Raymond McClean, a founder member of the SDLP and later the
mayor of Derry, told Lord Saville's inquiry that larger than usual
entry wounds in some of the victims suggested the use of 'dum-dum' bullets."

I wonder if the name for the altered bullets also originated in India.