At least two dozen warships from five nations began six days of exercises in the Bay of Bengal on Tuesday.
The United States is leading the naval drill, called "Malabar Exercise," which includes ships and fighter jets from India, as well as ships from Australia, Japan and Singapore.
The exercises have drawn the anger of India's Communist parties, which say they are an indication of India's growing subservience to the United States.
Indian Defense officials say the war-games are aimed at learning from each other and gaining from other's expertise.
Gautam Gupta has more on the story.