From Wikipedia on 1971 war: "The war began with Pakistan's Operation Chengiz Khan, consisting of preemptive aerial strikes on eight Indian air stations." India has never started a war. Period. In 2019 again Pakistan attacked first through it's terrorist proxies. In Sri Lanka Indian forces only killed LTTE who were Tamils of Indian origin. Nothing ever happened in sikkim.
Cannot reply to the comment below, so I'll comment here.
I see you had shifted the goal posts from being aggressor to "disproportionate response". My original comment said India has never been the aggressor and thanks for finally agreeing to that. I will not comment on the response being disproportionate or not, because that is just an attempt to derail the original conversation.
The conflicts with Pakistan always do start with Pakistan, but the response is always disproportionate, and seeds future similar conflicts. Its not starting a war. The Sri lanka conflict is not so simple. If you invade a country that doesn't consent to you being there, but only kill a non-governmental group while there, and then leave, I think that is essentially a war. Likewise when you set up fake referendums to annex Sikkim that is just conquest by other means. India has not behaved as badly as many other powers, but that foes not mean we shouldn't point out where it missteps.