France has no reason to attack Prussia. The only reason France attacked last turn was to prevent Prussia from getting too powerfull should they happen to beat the Russians. Little did we know that the US and UK would both enter as well. Had we known this we would have stayed out of the war.
France respects Prussia, which is why France demanded nothing from them.
I cannot speak for the Russians but I am sure they will not either.
To: The French Empire
From: The Prussian Union
If France respects Prussia so much, they would have let someone else offer this treaty rather than France, as the treaty itself is insulting. Besides, France's reasons for joining this war apply equally to Russia; if Russia were to become too powerful, they would be an even greater threat to France than Prussia, as their available manpower and resources are infinitely greater. This treaty will grant Russia power that, I am sure, France does not wish to give to another nation without first attempting intervention, as they have done with Prussia
If Russia continues in its unreasonable requests for territory from the Prussian Union, we ask that France reconsider the separate peace that we previously offered.
To: The Empire of Russia
From: The Prussian Union
The Prussian Union does not take kindly to insults such as your proposed treaty. It is nothing more than an attempt to push yourself into territory over which you no longer have a claim. If you had moved through this territory in the process of the war, we may have considered it fair; as it stands, Russia's demand of territory from the Prussian Union when they have yet to set foot upon Prussian soil is completely and utterly absurd.
We may be willing to grant you Latvia, but this is all you will get from the Prussian Union without a long and unfortunate conflict. In this peace, you will get an unmolested Latvia, prevent further damage to your economy, and gain reparations from the Prussian Union as a method of official apology; if you refuse a peace in which the only territory we cede in Europe is Latvia, you will gain nothing but burned and scarred land with no people or industries, your economy will be further damaged, lives will be needlessly lost, and Russia risks continued advancement by Japan, who has succeeded marvelously where we have failed.
To show our formal response, here is Prussia's proposed treaty after viewing your own:
Proposed Treaty
1. All fighting will cease between the Prussian Union and the Empire of Russia, as well as all their allies, including Japan.
2. A separate and reasonably fair peace offer must be extended to Japan by the Empire of Russia and all of its allies.
3. Prussia will cede German West Africa and German Southwest Africa to USA.
4. Prussia will cede German East Africa to the UK.
5. Prussia will cede the Estonia to Russia.
6. Finland will cease to exist as an independent nation and will be annexed by Russia, giving a bit of the north to Sweden.
7. Prussia will have a limit of 20 infantry, 10 cavalry, and 5 artillery, 1 goliath, 5 battleships, 20 light vessels, 10 transports, 20 escorts, and 5 submarines
8. Prussia will pay war reparations to Russia of 10 IC.
This is our absolute and final offer when it comes to territory. Reparations and military restrictions, however, are still up for discussion.