Rashtriya Swayamsevak Sangh (RSS) workers participate in a march in Beawar, Rajasthan, India.

By Tripti Lahiri and Shan Li

NAGPUR, India—India’s Rashtriya Swayamsevak Sangh, a right-wing Hindu group once banned following the assassination of Mahatma Gandhi by a Hindu nationalist, is stepping out of the shadows and flexing its power.

Earlier this month, the RSS—which counts Prime Minister Narendra Modi as a lifelong member and influences his government’s Hindu nationalist policies—held a gala celebration for its 100th anniversary.

This story was originally published in wsj.com. Read the full story here.