<a class="mw-redirect" href="https://en.wikipedia.org/wiki/Indo-Pakistani_War_of_1971" id="mw0A" rel="mw:WikiLink" title="Indo-Pakistani War of 1971">Indo-Pakistani War of 1971</a>: Pakistan launches <a href="https://en.wikipedia.org/wiki/Operation_Chengiz_Khan" id="mw0Q" rel="mw:WikiLink" title="Operation Chengiz Khan">a pre-emptive strike</a> against India and a full-scale war begins.