In a significant move that comes amid a Sino-India border row, India on Monday announced Australia's participation in the upcoming Malabar exercise along with the US and Japan, effectively making it the first military-level engagement between the four-member nation grouping- the Quad. Australia said Malabar-2020 marked a milestone opportunity for the Australian Defence Force.

from Times of India https://timesofindia.indiatimes.com/india/australia-will-participate-in-malabar-naval-exercise-govt/articleshow/78759997.cms