Are you curious to know exactly WHEN those huge armies will appear? In this post I have provided a list of dread stack spawn conditions for both TATW 3.2 and MOS 1.41 so you will know exactly when those instant armies will be popping up.
Vanilla TATW 3.2 Gondor:
-When Minas Tirith is lost OR less than 8 settlements: 1 dread stack
-When Tarnost is lost OR less than 6 settlements: 1 dread stack
-When less than 3 settlements: 1 dread stack
Rohan:
-When Edoras/ Horburg is lost OR less than 8 settlements: 1 dread stack
-When Eastfold is lost OR less than 6 settlements: 1 dread stack
-When less than 3 settlements: 1 dread stack
Dale:
-When less than 3 settlements: 1 dread stack
Eriador:
-When less than 3 settlements: 1 dread stack
Dwarves:
-When less than 3 settlements: 1 dread stack
High Elves:
-When less than 3 settlements: 1 dread stack
Silvan Elves:
-When Celebrant/ Lothlorien is lost: 1 dread stack
-When less than 3 settlments: 1 dread stack
Mordor:
-When Black-Gate/ Minas Morgul is lost OR less than 7 settlements: 1 dread stack
-When enemy named character spends 2 turns near barad-dur: 1 dread stack (+witchking)
-If Mordor gets the ring: 1 dread stack outside barad-dur (+sauron)
Isengard:
-When Isengard is lost: 1 dread stack
-When Duneard is lost: 1 dread stack
Harad:
-When less than 3 settlements: 1 dread stack
Rhun:
-When less than 3 settlements: 1 dread stack
OotMM:
-When Goblintown/ Moria is lost: 1 dread stack
Massive Overhaul Sub-Mod 1.41 Gondor:
-[If Playing with Beacons of Gondor] - When sieging Minas Tirith: 1 Rohirrim dread stack
-[If Playing with Beacons of Gondor] - When sieging Dol Amroth: 1 Rohirrim dread stack
-When Minas Tirith is lost OR less than 8 settlements: 1 dread stack
-When Tarnost is lost OR less than 6 settlements: 1 dread stack
-When less than 3 settlements: 1 dread stack
Rohan:
-[If Playing with Beacons of Gondor] - When sieging Edoras: 1 Gondor dread stack
-[If Playing with Beacons of Gondor] - When sieging Helm's Deep: 1 Gondor dread stack
-When Edoras/ Horburg is lost OR less than 8 settlements: 1 dread stack
-When Eastfold is lost OR less than 6 settlements: 1 dread stack
-When less than 3 settlements: 1 dread stack
Dale:
-[If Playing with Beacons of Gondor] - When sieging Dale: 1 Dwarven dread stack
-[If Playing with Beacons of Gondor] - When sieging Long Lake: 1 Dwarven dread stack
-When less than 3 settlements: 1 dread stack
Eriador:
-When less than 3 settlements: 1 dread stack
Dwarves:
-[If Playing with Beacons of Gondor] - When sieging Erebor: 1 Dale dread stack
-[If Playing with Beacons of Gondor] - When sieging Iron Hills: 1 Dale dread stack
-When less than 3 settlements: 1 dread stack
High Elves:
-When less than 3 settlements: 1 dread stack
Silvan Elves:
-When Lothlorien is lost: 1 dread stack
-When Thranduil's Halls are lost: 1 dread stack
-When less than 3 settlments: 1 dread stack
Lorien Elves:
-When Celebrandt/Lothlorien is lost: 1 dread stack
Mordor:
-[If Playing with Eastern Shadows] - Each turn there is a 50% chance this script gets 1 point. After 10 points have gathered the counter resets and a dread stack spawns outside the Black Gates
-When Black-Gate/ Minas Morgul is lost OR less than 7 settlements: 1 dread stack
-When enemy named character spends 2 turns near barad-dur: 1 dread stack (+witchking)
-If Mordor gets the ring: 1 dread stack outside barad-dur (+sauron)
Isengard:
-[If Playing with Mysterious Documents] - After turn 50 if you accept to play with this script an eliete dread stack appears outside Isengard
-[If Playing with Strong Isengard] - Each turn there is a 50% chance this script gets 1 point. After 10 points have gathered the counter resets and a dread stack spawns near Isengard
-When Isengard is lost: 1 dread stack
-When less than 3 settlements: 1 dread stack
OotMM:
-[If Playing with Beacons of Gondor] - When sieging Moria: 1 Gundabad dread stack
-[If Playing with Beacons of Gondor] - When sieging Goblin Town: 1 Gundabad dread stack
-When Goblintown/ Moria is lost: 1 dread stack
Gundabad:
-[If Playing with Rhudar Warriors] - Each turn there is a 50% chance this script gets 1 point. After 10 points have gathered the counter resets and a dread stack spawns near Carn-Dum
-[If Playing with Beacons of Gondor] - When sieging Gram: 1 OotMM dread stack
-[If Playing with Beacons of Gondor] - When sieging Gundabad: 1 OotMM dread stack
Harad:
-When less than 3 settlements: 1 dread stack
Rhun:
-[If Playing with Mysterious Documents] - After turn 80 if you accept to play with this script an eliete dread stack appears outside Mistrand
-When less than 3 settlements: 1 dread stack
If anyone knows of any other dread-stack spawns please feel free to post them below and I'll be sure to add them in! Hope this helps some of you!