Mattis stressed the inaugural US-India "2+2" Ministerial Dialogue, which was held in September in New Delhi, "made clear our commitment to further bolster our major defence partnership."
Sitharaman said that India saw the US as an important partner in defence.
"We have good military-to-military cooperation, defence consultations, scientific and R&D work, defense trade, co-production and co-development, and industry collaboration," she said.
India, however, also traditionally enjoyed a close defence relationship with Russia.
In October, Indian and Russian leaders formally signed a purchase agreement for the S-400 air defence missile system worth more than $5 billion.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)