The Flags of Our Enemies:1776 through 1945

I am ignoring short skirmishes, the Indian Wars and the various "interventions" fought on behalf of the United Fruit Company.  I am also ignoring the more pissant nations in both World War I and World War II.

 With the possible exception of the Quasi-War, these are all full-on fights against another nation.

The Revolutionary War:

The War of 1812:

The Quasi-War:

The Quasi-War was pretty much fought only at sea as a result of "the XYZ Affair".  It ended because the French were more interesting in fighting the British (sort of the reverse of the reason why the War of 1812 ended).

The Mexican War:

The Civil War:

Yes, folks, that was the flag of the CSA for at least the first half of the war. The flag that you are used to seeing as the "Confederate Flag", a/k/a the Flag of the Traitors, was the battle flag of Gen. Lee's Army of Northern Virginia.

The Spanish War:

The Phillipine War was more of an insurgency, so I am not listing it here.

The First World War:

Germany:

The Austro-Hungarian Empire:

The Ottoman Empire:

The Second World War:

Germany:

The Empire of Japan:

             (The "Rising Sun" flag was the war flag of the Navy and Army.)

Italy: