The <a href="https://en.wikipedia.org/wiki/League_of_Nations" id="mwng" rel="mw:WikiLink" title="League of Nations">League of Nations</a> bans foreign national "<a href="https://en.wikipedia.org/wiki/Unlawful_combatant" id="mwnw" rel="mw:WikiLink" title="Unlawful combatant">volunteers</a>" in the <a href="https://en.wikipedia.org/wiki/Spanish_Civil_War" id="mwoA" rel="mw:WikiLink" title="Spanish Civil War">Spanish Civil War</a>.