Map of <a href="https://en.wikipedia.org/wiki/Participants_in_World_War_II" class="extiw" title="en:Participants in World War II">Participants in World War II</a>:
<div class="legend" style="direction:ltr;line-height:23px;"><div class="legend-content" style="display:inline-block;vertical-align:top;box-sizing:border-box;width:34px;height:23px;overflow:hidden;font-size:15px;border:thin solid #333;background:#63B74E;color:#202122;text-align:center;"> </div> <a href="https://en.wikipedia.org/wiki/Allies_of_World_War_II" class="extiw" title="en:Allies of World War II">Allies</a> before the <a href="https://en.wikipedia.org/wiki/Attack_on_Pearl_Harbor" class="extiw" title="en:Attack on Pearl Harbor">Japanese attack on Pearl Harbor</a>, including colonies and occupied countries.</div>
<ul><li>Dark green diamonds represent countries that initially were neutral but during the war were annexed by the USSR</li></ul><div class="legend" style="direction:ltr;line-height:23px;"><div class="legend-content" style="display:inline-block;vertical-align:top;box-sizing:border-box;width:34px;height:23px;overflow:hidden;font-size:15px;border:thin solid #333;background:#4BF025;color:#202122;text-align:center;"> </div> Allied countries that entered the war after the attack on Pearl Harbor.</div>
<ul><li>Light green diamonds represent countries that later in the war changed from the Axis to the Allies</li></ul><div class="legend" style="direction:ltr;line-height:23px;"><div class="legend-content" style="display:inline-block;vertical-align:top;box-sizing:border-box;width:34px;height:23px;overflow:hidden;font-size:15px;border:thin solid #333;background:#2AACF6;color:#202122;text-align:center;"> </div> <a href="https://en.wikipedia.org/wiki/Axis_Powers" class="extiw" title="en:Axis Powers">Axis Powers</a>, their allies and their colonies.</div>
<ul><li>Light blue diamonds represent countries either being conquered by the Axis Powers, becoming puppets of those (<a href="https://en.wikipedia.org/wiki/Vichy_France" class="extiw" title="en:Vichy France">Vichy France</a> and several <a href="https://en.wikipedia.org/wiki/French_colonies" class="extiw" title="en:French colonies">French colonies</a>).</li></ul><div class="legend" style="direction:ltr;line-height:23px;"><div class="legend-content" style="display:inline-block;vertical-align:top;box-sizing:border-box;width:34px;height:23px;overflow:hidden;font-size:15px;border:thin solid #333;background:#E4E4E4;color:#202122;text-align:center;"> </div> <a href="https://en.wikipedia.org/wiki/Neutral_country" class="extiw" title="en:Neutral country">Neutral countries during WWII</a></div>
<ul><li>Circles represent city-states or geographically small countries.</li></ul>
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