https://en.wikipedia.org/wiki/India–Indonesia_relations#HistoryIndonesia offered to provide Pakistan with military help, and 'to seize Andaman and Nicobar Islands' of India so as to distract it from the Kashmir front, eventually mobilizing submarines to help Pakistan
Say Pakistan takes Indonesia up on the offer and Indonesia tries to seize the Andaman and Nicobar Islands
Would Indonesia be able to take the Islands
If they took the Islands would they be able to hold it against an Indian counterattack
What would be the impact