<a href="https://en.wikipedia.org/wiki/Cold_War" id="mw-Q" rel="mw:WikiLink" title="Cold War">Cold War</a>: <a href="https://en.wikipedia.org/wiki/East_Germany" id="mw-g" rel="mw:WikiLink" title="East Germany">East Germany</a> closes the border between the <a href="https://en.wikipedia.org/wiki/East_Berlin" id="mw-w" rel="mw:WikiLink" title="East Berlin">eastern</a> and <a href="https://en.wikipedia.org/wiki/West_Berlin" id="mw_A" rel="mw:WikiLink" title="West Berlin">western sectors</a> of <a href="https://en.wikipedia.org/wiki/Berlin" id="mw_Q" rel="mw:WikiLink" title="Berlin">Berlin</a> to thwart its inhabitants' attempts to escape to the <a href="https://en.wikipedia.org/wiki/Western_world" id="mw_g" rel="mw:WikiLink" title="Western world">West</a>, and construction of the <a href="https://en.wikipedia.org/wiki/Berlin_Wall" id="mw_w" rel="mw:WikiLink" title="Berlin Wall">Berlin Wall</a> is started.<sup about="#mwt38" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-6"}}' id="cite_ref-6" rel="dc:references" typeof="mw:Extension/ref"><a href="./August_13#cite_note-6" id="mwAQA" style="counter-reset: mw-Ref 6;"><span class="mw-reflink-text" id="mwAQE">[6]</span></a></sup> The day is known as <a href="https://en.wikipedia.org/wiki/Barbed_Wire_Sunday" id="mwAQI" rel="mw:WikiLink" title="Barbed Wire Sunday">Barbed Wire Sunday</a>.
<span class="mw-reference-text" id="mw-reference-text-cite_note-6"><cite about="#mwt35" class="citation web cs1" id="mwBrU"><a class="external text" href="https://www.berlin.de/mauer/en/history/construction-of-the-berlin-wall/" id="mwBrY" rel="mw:ExtLink nofollow">"Construction of the Berlin Wall"</a>. <i id="mwBrc">Berlin.de</i>. <a class="external text" href="https://web.archive.org/web/20181116075756/https://www.berlin.de/mauer/en/history/construction-of-the-berlin-wall/" id="mwBrg" rel="mw:ExtLink nofollow">Archived</a> from the original on 16 November 2018<span class="reference-accessdate" id="mwBrk">. Retrieved <span class="nowrap" id="mwBro">12 August</span> 2017</span>.</cite><span about="#mwt35" class="Z3988" id="mwBrs" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=Berlin.de&amp;rft.atitle=Construction+of+the+Berlin+Wall&amp;rft_id=https%3A%2F%2Fwww.berlin.de%2Fmauer%2Fen%2Fhistory%2Fconstruction-of-the-berlin-wall%2F&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AAugust+13"></span></span>