Nope.
Let's see what we currently have:
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1. Unknown
2. Battle of the Granicus River, 334 BC- the first of Alexander the Great's showdowns with the Persians
3. Unknown
4. Battle of Bunker Hill, 1775- The first significant battle of the American Revolutionary War
5, Borodino, 1812- the final showdown between Napoleon and the Russians
6. The Marne, 1914- the German invasion of France in World War I, last of the mobile battles on the Western Front
Well, with the revelations of Borodino, the Marne, and the Granicus River, my original idea falls apart. Though for those interested, my thought was that the battles might all have been Pyrrhic victories.
However, the three just revealed do support the idea that all the dioramas are showing what could be considered major turning points in each battle's respective larger war.
Question, then (related to your personal knowledges between you)
Why Borodino and not Waterloo?
Why Granicus River and not Issus?
Why the Marne and not Verdun? Tannenburg? For a wide campaign, the failure of the Kaiserschlacht?
Why not Stalingrad? Agincourt? Normandy? Hastings? All highly decisive battles.
(one of those four COULD have been used, just to throw you off. In the end, there are only six slots, of course)