It goes back further than that- again, Garland would have to be stupid to move all his soldiers out of his heartland just so he can seize power, or else there would have been no epic fight at King's Landing, and Tyget would have done it already. I've done the maths and checked the facts of time, place and space that the Reach has and hasn't got, what would have gotten out, who would know what, and who is where. The Tyrells know the facts that they know with who can do what, and they also know that even an oaf would get what would happen next, like Loras, from the very moment that Garland was stabbed by a Crakehall and that there was a fight in the Kingswood, 2,000 men routing and panicked.....that was approximately a week and a half ago in the RP, and I remind myself, it takes about two to three weeks to mobilize soldiers from all across the Reach, something that started from the very, very moment Garland sent the Tumbleton retinue in.
I can use each of those arguments straight back at you too (let's say, the Reach is quite large? As is the Westerlands from east to west, the routers would take a week to get across entirely to the Oceanroad/Casterly Rock, and that is saying if they are wanting to fight again, so let's say they are- then they need to somehow march south with the other forces who have returned from a long campaign already)- the argument of none of the Lords being a happy family is true, but they'd respond if you know, a Westerman stabbed the Lord that had help recently pacify their squabbles, inclusive of the fact that they were already told of an imminent war, and had already gathered their grain. I'd think that again, I can ask exactly the same of you- wouldn't the Houses of the Westerlands be sick of fighting a war on one front that they've basically abandoned, and the other where they've lost a key battle, been set on fire with dragons too? Respond to that, I ask- and your response could be for a different context which I couldn't argue with, but you're interpreting a war machine as an infinitely ploughing act, not a slow, grinding set of cogs that take time to spin and to slow down. Garland will come back to some unhappy vassals in the aftermath, and I agree, this is something I will play to really well, it'll definitely highlight some court politics in Highgarden itself which I really want to do. But those questions you ask me, ask yourself, ask yourself how you played several posts ago, and what is left, and what are the future consequences, plans and ways of making it work. I've watched, and if you're in IC, you would watch too.
If you specify that more than 30,000 men are available for any such movement and that they'd make it in days (when it would likely take about a week and a half, given the distance between all over the Westerlands and the Oceanroad, which is again, depleted), you're talking out of your arse. It's not a slaughter, far from it- though remember. I'd like to think of it as the moment Tyget goes a little mad, rather than his cunning, calculated self, taking three hours to take a shit, as you would have called it. It'll give you a huge advantage for a while, I'll agree, and it'll be a driving, hard attack. I'll give you that, actually, it would make sense from Tyget to do this- if Garland is so charismatic, then no way his armies would even stop that, correct?
Interpretations, my friend. There's more to the Reach than Garland, like there's more to the Westerlands than Tyget. The uncertaintities make it fun to RP- like the moment that KL was won by a slither. Or like the fact that the eastern Westerlands, southern Riverlands and north-eastern Reach are taken by a rogue Lord with Gerald by his side, which adds a whole level of uncertaintity. What happens on the Reach's end though, I wouldn't argue with, and what you come up against will definitely make you think.
I'd like to stop as of now- and this is why RPing massive fights is difficult. But what you'll see is what you'll get- and I should say too, that so long as you accept the consequences of number, place, space and time, as well as previous acts on the present and future, I'm absolutely fine about it. I won't make assumptions of you, if you don't make assumptions of me- but remember what is stated, what is known, and most critically, what characters would do in that situation to respond. The cards are played already- when you turn them over, you see what you get :)