What about the army from the veil?
How big is the Lannister army?
shadowbannedkiwi
"The Tyrells are said to have over 80,000 troops. When they were with Renly and his supporters, they numbered over 100,000.
The Lannisters had 60,000 deployed during the war, but it's not full strength. They lost more than half their troops to Robb Stark and the Riverland armies. If they also numbered 100,000 at peak strength then it's possible that now they're around 60,000 strong or more left in the Seven Kingdoms.
Walder Frey had about 4,000 men at the start of the series and likely more from supporters. By now it's possible that he has maybe slightly more or slightly less.
The Greyjoys never had a large army and the civil war only weakened them immensely. Yara once had 30 Longships, each holding more than 100 men. That's 3,000 fighters and it sounded like they had a lot more. Could be currently sitting at about 10,000 peak strength now. Small for an entire Kingdom.
Dorne never went to war so they still have peak strength. Since the show follows the population of the books, Dorne likely has one of the larger and healthier armies left standing at over 30,000 peak. How many Doran had at Sunspear is hard to say. Maybe 100,000 total population with soldiers and guard on watch within. The military standing at over 10,000?
The Vale also haven't been involved in the war, and haven't been a very active Kingdom for a long time having stayed out of a lot of the fighting making their troops inexperienced compared to others, but their gear is rich and their training consistent. Think of them as the smaller Westerland army. Quality gear but half the size.
The Vale in the books in peak strength have over 30,000 troops. How many Robin Arryn has to command immediately is unknown. Like any of the major lords and cities he could command more than 5,000 troops or a max 10,000 at his immediate beckoning.
--Adding on to what was already said--
From what we heard from Smalljon Umber, they have less than 5,000 troops. Could be 1,000 left standing since most of their fighting men went with Robb Stark, or just over 2,000.
Karstarks forces returned after their lord was executed and they made half of Robbs army of less than 18,000. By this time I'm thinking he has about 10,000 men left as he had some of the lords return to the North, and some to attack smaller fortifications. So the Karstarks could have maybe 4,000-5,000 troops.
The Boltons had 5,000 troops, maybe less after fighting Stannis' army but I wouldn't rule it being less than 4,000. So the Boltons together have over 12,000 troops combined, only assuming Karstark and Umber rally their entire forces. A deployed army could be as much as 10,000 in the end. Ramsay seems like the kind of person who would rally his entire army. The Umbers would have no choice but to rally their whole army since they're closer to the Wall. Karstark may not deploy their entire army.
The Wildlings might be able to pull 2,000 troops. I doubt the Nights Watch will join them, also due to the fact that there's less than 100 of them now. If Jon could convince their allies to help them, then each lord could possibly send 1,000 or 2,000 troops in support, but I doubt they would fight alongside Wildlings. Only with the Vale can they stand a chance but I have doubts that they can win even with their help. The Vale aren't Northerners and we saw what the cold did t Stannis' army.
Danerys had 8,000 fighting Unsullied and 2,000 boys, and 2,000 Second Sons. I doubt they lost a large number of them. Maybe under 100. With 100,000 Dothraki she has over 110,000. Not sure if the 100,000 was fighting or total population, but she now has multiple hordes working for her and with them, they can grow even stronger"