60000 shields: (main battle front)
20k from the Stark
30k for the Lannister20000 archers: Combined forces of House Lannister, Stark, Targaryen. (Left at back of main Front)
Roughly 1000 Land Siege Weapons (Catapults, Siege Ballistae (Such as Scorpions), Arbalests, Gate Rams, Trebutchets, ect)
60000 Wildfire Pots.
40000 Dothraki Screamers
3000 men for Westeros Cavalry (Starks, Lannisters, etc)
25000 Soldiers left on reserve (Comprised of the Unsullied, And other minor houses of Westeros)
1000 Ships of the Iron Fleet
1000 Ships of the combined the Targaryen, Dorne and Reach navies
100000 Wights (minor possible number of dead)
40 dead Mammoths
5 packs of wolves (100 wolves)
150 Giants (dead Giants)
25 White Walkers
1 Undead Dragon
2 dragons
Main Characters: Dany, Tyrion, Cercei, Jamie, Euron, Jon, Bran, Night King, and Arya.
That's the estimated force of Season 7. It's not set in stone, as I had to speed watch the forst half of the season (Damn network didn't announce the start of the season for me before playing it) and I may be misremembering aprts of numbers, but this is at leats partially refferenced at the end of season 6 as well, so yeah.