Nicely done! Don't worry, we'll get through the challenges ahead of us.
move all our healed units out of Yaro onto the plains road NW of Orenburg
Please don't do that.
Perhaps we should alow him to attack, even at loosing odds.
Every battle that we lose means Stalin not talking to us for an even longer period of time, so even more turns where we'll have to face his army. I'd rather not fight losing battles that are completely avoidable.
Skip turn instead of Sentry
Sentry was a very poorly-programmed Unit action, and it doesn't really work in a useful way, so I suggest not using it. Our Warrior 1 is on "Sentry" duty and an enemy Spearman is right next to him and our Warrior is just sitting there, not telling us anything. How silly is that situation? I would recommend never using Sentry and instead just taking the extra moment to Skip turn (the Spacebar is a hotkey to Skipping turn because it's an action that is expected to be used a lot).
In this way, we will get the screen visually centered on each Unit, so that we can visually scan the area around the Units that aren't moving on a given turn. Our own eyes are better resources than those of our Units when the programming for the Sentry action is so poor.
Obviously, Warrior 1 can't stay next to Stalin's Spearman and we'll have to retreat westward toward Argent. Chances are that that Spearman is the advance scout for the Settler Party at 2 E of Moscow.
Orenburg (Desert City)
As a general comment on tactics, had Orenburg been lightly-defended with the typical 2 City Defenders, taking the Worker first when we only had 5 attackers might have meant not capturing the City. In this case, taking the Worker worked out better, but in general, Cities first and everything else (battles in the field, Worker steals) only really matter if the Cities can't be captured and held.
Since Cities are the key, we're probably going to have to gift Yaroslavl' to an AI to keep it out of Russian hands (I don't welcome the idea of having to re-fight Stalin for the ownership of Yaroslavl'), but the timing of when we do that may want to wait until we've gotten our War Elephant whipped and completed (our Worker 11 is one turn away from restoring access to Ivory in Yaroslavl').
Plus, Churchill is still not talking to us, so we can't yet Cease Fire with Churchill in order to gift him Yaroslavl'.
Chariot 5 is doomed, but what can we do about it to make him give us the most bang for our buck? I'd say that we move him 1 NE Plains to 1 N of Orenburg. Doing so forces Stalin to split up his troops to go after both Chariot 5 and the captured Worker, leaving less troops to marge on Yaroslavl'.
If it weren't for the troops that could march on Yaroslavl', I'd suggest that we consider stealing the Worker at 2 N of Yaroslavl', but given that impending army of doom marching toward us, I'd say that splitting up our Yaroslavl' forces would be quite foolhardy and we're best off just waiting in Yaroslavl' to see what Stalin does, keeping our troops together in hopes that he splits up his forces in a way that we can better deal with them.
Keeping our troops inside of Yaroslavl' this turn and then reacting to what Stalin does is our best play at the moment, allowing us the freedom to attack split-up Units, to defend (defenders get the advantage when mixed troops are involved), or to gift the City and run away.
Paris
Okay, so we grew a bit faster than expected and grew into Unhappiness, but we need to grow the City and keep growing it, even if we grow into Unhappiness. So, let us keep growing Paris.
Paris will grow Happy next turn when 1 Whipping Unhappiness wears off and we'll build a new Chariot out of Lyons in 2 turns' time, to give us another Happiness in Paris.
Hatty
It seems that Hatty has finally felt that she has enough Culture in Macau to start slowly growing the City.
She is also building an Islamic Misisonary, so there's a hope that she'll spread Islam to our Cities, but she'll likely spread it to her own Cities, first.
We can Road the second Incense for her, hoping that she'll connect it up with another Fort or a Plantation and then be able to trade it to us.
Frederick
I don't know how you managed to bribe him, but it looks like he is going to finish off the Road between Orleans and Cologne.
Moscow and St. Pete's
I don't know what the right level of explanation is supposed to be for a PPP. I'd actually planned to play that turnset if someone had been around to approve the PPP, so I didn't explain inside of the PPP (I mentioned the subject out of the PPP but didn't explain it clearly) why I suggested putting our Axeman 6 (Woodsman II) at 1 E of St. Pete's--it was to try to bait Moscow's Spearmen to come toward St. Pete's.
The thinking is that we'd have our Axemen form a wall on the Forests, forcing any Spearmen that came at the Chariot-defended St. Pete's to walk around our Forest-defending Axemen onto flatland squares. Now, we've left a gap and Spearmen can go straight toward St. Pete's through the gap, allowing them to walk on a Forest instead of the hoped-for flatland. In the end, Stalin might not take the bait, so it may not matter, but if he takes the bait, the Spearmen won't be easy pickings in a Forest.
I didn't explain myself clearly, and I'm sorry for that. But, it's going to be hard to suggest Unit movements of our troops advancing on Moscow until we see what happens next turn, so I won't suggest any such movements until after we've played into the next turn and can figure out what to do, based on whether Stalin takes the bait or not.
England
It seems that the water supply got Poisoned in York. The little punk of a Spy laughed at our Spy (Churchill's Spy didn't get caught by our Spy), and he peed in our water before hightailing it to Vlad.

At least that Spy won't be causing any more trouble in England, due to having teleported into Churchill's capital of Vlad.
It works as follows: each turn, 1 Unhealthiness will wear off for the next 8 turns.
So, we'll whip York this turn (to earn us back 1 Healthiness) and we'll avoid completing the Forests next turn (to maintain 1 Healthiness).
What happened to Churchill's Worker? Did it get disbanded? I suppose that we would have seen it if it were to the east of Axeman 3 (Woody II) and if it were to the east, you'd have mentioned it, right?
Ruby Bay has a Chariot in it who could move in advance of the rest of the stack toward London, so that we don't have 4 Units trying to board the Galley all on the same turn as each other.
Mehmed
Trade:
War with Stalin + 10 Gold <-> Aesthetics
I'd suggest that we ask him to attack Moscow (not Orenburg, as AIs need a pretty straight-forward path and Orenburg looks like it might cause pathing issues for Mehmed's Units, what with it being on the opposite side of a body of water).
Southern Navy
No comments from anyone... I suppose that the safest play is to have Galley 6 head toward Lyons. I suppose that Galley 7 can push a bit further eastward, but I'm not sure that he'll play any useful role there, with so many Peaks in the region.
Suggested PPP
T106, 225 BC
Trade:
War with Stalin + 10 Gold <-> Aesthetics
Ask Mehmed to attack Moscow
Paris steals Cow from Orleans
Paris switches Scientist -> Cow
Paris switches G For -> G Riv Farm
Paris works: Wheat, Deer, Fur, Copper, Cow, Farm, Cottage, and Cottage
Orleans works: Fish and Iron
York 1-pop-whips Spy
York works: Fish and Horse
Rostov builds War Elephant (the Courthouse can wait until we put 1 Chop into it and 1-pop-whip it)
EDIT: Chariot 6 (in Yaroslavl') moves 1 SE P Road (0.5 movement) > Pillages the Road (1 movement) > returns to Yaroslavl' (0.5 movement).
Warrior 1 (in Scandinavia) runs 1 W toward Argent
HA 12 (1 E of Ruby Bay) Promotes to Combat I
Chariot 19 (in Ruby Bay) wakes up and moves along the Roads to the G Riv at 1 W of London
Chariot 5 (1 W of Orenburg) abandons the Worker and moves 1 NE P (1 N of Orenburg)
HA 9 (in Cologne) Skips his turn to partially heal inside of a City
Galley 6 heads toward Lyons
T107
XO Cognac completes Courthouse -> Library
York completes Spy -> Work Boat (for New Nottingham)
I imagine that Yaroslavl' will have to build something temporarily due to losing access to Ivory
Orleans builds Christian Missionary
Orleans steals Cow
Orleans works: Fish, Cow, and Iron
Check that Paris hasn't hired any Scientists and instead work all of the improved squares followed by Forests (no change migiht be needed)
Lyons builds Chariot (needed for Paris)
Argent 2-pop-whips Catapult
Argent works: Fish and Deer
Athens switches P Riv Cottage -> Sheep
Jackpot 1-pop-whips Chariot
Worker 1 (1 SE + 1 S of Paris) moves 1 NW to 1 S of Paris, partial Cottages, and STOPS
Worker 2 (1 E of Gold Coast) moves 1 NW P (1 N of Gold Coast) and Roads
Worker 3 (at the Resort) finishes the Chop
Worker 5 (1 E of York) Chops and STOPS at 1 E of York
Worker 6 (1 SE of York) moves along the Roads to 1 SE of Ruby Bay (G Riv Road), partial Farms, and STOPS (we can complete both Chops at York next turn)
Worker 7 (1 SE + 1 E of Argent) builds Road on GH For
Worker 8 (1 NW of Cologne) finishes Chop into Granary
Worker 9 (1 W of Paris) moves 1 NW G Riv (1 SE of Jackpot) and Cottages
Worker 10 (2 S of Rostov) Chops the P Riv Road
Worker 11 completes the P Road at 1 SE + 1 E of Rostov
Yaroslavl' starts building a War Elephant again
Units near St. Pete's remain unmoved, including Axe 8 and HA 4, the Cats and our Axemen, and the Chariot in St. Pete's. Let's figure out what to do after Stalin has had his turn.
New Spy in York Fortifies in York
Chariot 9 (in south-east Egypt) heads back out of the pathway that led to nowhere
Cat 1 (1 NW of Cologne) moves 1 NE onto Galley 3
Galley 3 (with Cat 1 aboard) sails E > NE to 1 NW of Hamburg
Cat 4 (1 SE + 1 E of Argent) moves 1 SE onto Galley 4
Galley 4 (with Cat 4 aboard) sails SE > E to meet up with Galley 5
Cat 4 transfers to Galley 5
Galley 5 (with Cat 4 aboard) sails 2 E to 1 W of St. Pete's
Galley 1 (1 W of St. Pete's) sails back 2 W (to 3 W of St. Pete's)
Warrior 1 (in Scandinavia) will probably need to keep running 1 W toward Argent, assuming that the Spearman keeps following him; if the Spearman didn't follow him, he can Skip his turn
Let's hold off on moving Units near Russia (besides our Workers). What we do with our troops over the next couple of turns may prove to be critical, thanks to the nice surprise in Orenburg and the possible finessing of Spearmen out of Moscow heading through the Forest to St. Pete's.
Who will spawn-bust north-east England? I suggest Chariot 15
Chariot 15 (1 E of Ruby Bay) moves 1 NE G For
Axe 3 (razed Nottingham) moves 1 SE G For and if there's no Worker, moves 1 S G For (providing anti-Barb-Galley-spawning coverage)
Chariot 19 can board Galley 2 in London
Galley 2 (with Chariot 19 aboard) sails 2 SE to 1 W of Orleans
HA 12 and Chariot 17 (1 E of Ruby Bay) can move along the Roads to the G Road at 1 W of London
Chariot 13 (1 SE of Berlin) makes its way along Roads toward Russia (feel free to make note of what's in Munich as we pass by the City, probably ending up at 2 E of Munich (1 NW + 1 N of Rostov)
HA 9 (in Cologne) makes it way along Roads toward Russia
EDIT: Missionary in Orleans heads toward Jackpot (along the Roads to 1 SW of Paris)