<a href="https://en.wikipedia.org/wiki/World_War_I" id="mwiQ" rel="mw:WikiLink" title="World War I">World War I</a>: <a href="https://en.wikipedia.org/wiki/German_Empire" id="mwig" rel="mw:WikiLink" title="German Empire">Germany</a> is the first to make large-scale use of <a href="https://en.wikipedia.org/wiki/Chemical_weapons_in_World_War_I" id="mwiw" rel="mw:WikiLink" title="Chemical weapons in World War I">poison gas</a> in warfare in the <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Battle_of_Bolimów" id="mwjA" rel="mw:WikiLink" title="Battle of Bolimów">Battle of Bolimów</a> against <a href="https://en.wikipedia.org/wiki/Russian_Empire" id="mwjQ" rel="mw:WikiLink" title="Russian Empire">Russia</a>.<sup about="#mwt65" class="mw-ref reference" data-mw='{"name":"ref","attrs":{},"body":{"id":"mw-reference-text-cite_note-11"}}' id="cite_ref-11" rel="dc:references" typeof="mw:Extension/ref"><a href="./January_31#cite_note-11" id="mwjg" style="counter-reset: mw-Ref 11;"><span class="mw-reflink-text" id="mwjw">[11]</span></a></sup>
<span class="mw-reference-text" id="mw-reference-text-cite_note-11"><cite about="#mwt62" class="citation book cs1" id="CITEREFCook2016">Cook, Tim (2016). "Chemical Weapons". In Tucker, Spencer C. (ed.). <a class="external text" href="https://books.google.com/books?id=axoADAAAQBAJ" id="mwBxQ" rel="mw:ExtLink nofollow"><i id="mwBxU">World War I: The Essential Reference Guide</i></a>. Santa Barbara, Calif.: ABC-CLIO. p.<span id="mwBxY" typeof="mw:Entity"> </span>42. <a class="mw-redirect" href="./ISBN_(identifier)" id="mwBxc" rel="mw:WikiLink" title="ISBN (identifier)">ISBN</a><span id="mwBxg" typeof="mw:Entity"> </span><a href="./Special:BookSources/9781440841217" id="mwBxk" rel="mw:WikiLink" title="Special:BookSources/9781440841217"><bdi id="mwBxo">9781440841217</bdi></a>.</cite><span about="#mwt62" class="Z3988" id="mwBxs" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=bookitem&amp;rft.atitle=Chemical+Weapons&amp;rft.btitle=World+War+I%3A+The+Essential+Reference+Guide&amp;rft.place=Santa+Barbara%2C+Calif.&amp;rft.pages=42&amp;rft.pub=ABC-CLIO&amp;rft.date=2016&amp;rft.isbn=9781440841217&amp;rft.aulast=Cook&amp;rft.aufirst=Tim&amp;rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DaxoADAAAQBAJ&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AJanuary+31"></span></span>