Vietnam War: <a href="https://en.wikipedia.org/wiki/Operation_Linebacker" id="mwAQ8" rel="mw:WikiLink" title="Operation Linebacker">Operation Linebacker</a>, a US bombing campaign against <a href="https://en.wikipedia.org/wiki/North_Vietnam" id="mwARA" rel="mw:WikiLink" title="North Vietnam">North Vietnam</a> in response to its <a href="https://en.wikipedia.org/wiki/Easter_Offensive" id="mwARE" rel="mw:WikiLink" title="Easter Offensive">Easter Offensive</a>, ends after five months.