Увы, механизмом самой игры этот процесс заранее заблокирован, так как ни СССР, ни Германия из своего союза (Ось и Коммитерн) выйти не может. А попытка вменить власть не совсем законная (без читов ее не сделаешь), да и глючная она (у меня почему-то "зависают" те техи, которые изучались в момент сменения правительства и изучать их дальше становится невозможным).

при заключение пакта М-Р за ссср можно выбрать "заключить союз"

эвент М-Р пакт за ссср:

...
action_a = {
name = "ACTIONNAME2600A" # A Most Excellent Proposition
ai_chance = 96
command = { type = trigger which = 2013 } # GER

command = { type = end_guarantee which = SOV where = FRA }

# Estonia
command = { type = addcore which = 199 }
command = { type = addcore which = 195 }
command = { type = addcore which = 194 }
command = { type = addcore which = 196 }
command = { type = addcore which = 193 }

# Latvia
command = { type = addcore which = 197 }
command = { type = addcore which = 198 }
command = { type = addcore which = 202 }
command = { type = addcore which = 203 }
command = { type = addcore which = 204 }
command = { type = addcore which = 205 }

# Lithuania
command = { type = addcore which = 577 }
command = { type = addcore which = 511 }
command = { type = addcore which = 207 }

# Bessarabia
command = { type = addcore which = 434 }
command = { type = addcore which = 435 }
#command = { type = addcore which = 433 } #Iasi
command = { type = addcore which = 230 }

# Claims on Finland
command = { type = addcore which = 146 }
command = { type = addcore which = 145 }
command = { type = addcore which = 132 }

command = { type = relation which = GER value = 15 }
command = { type = relation which = FIN value = -5 }
command = { type = relation which = POL value = -50 }
command = { type = relation which = LIT value = -10 }
command = { type = relation which = LAT value = -10 }
command = { type = relation which = EST value = -10 }
command = { type = domestic which = interventionism value = 1 }

command = { type = sleepevent which = 2650 } #Germany attacks w/o pact
}
action_b = {
name = "ACTIONNAME2600B" # No deals with the enemies of the Workers!
ai_chance = 3
command = { type = trigger which = 2014 } # GER
command = { type = relation which = GER value = -15 }
command = { type = sleepevent which = 2018 }
command = { type = sleepevent which = 2605 } #Germany dishonors Pact
}
action_c = {
name = "ACTIONNAME2600C" # Propose an unholy alliance
ai_chance = 1
command = { type = relation which = GER value = 25 }
command = { type = trigger which = 2015 } # GER

command = { type = sleepevent which = 2650 } #Germany attacks w/o pact
}

выбираем вариант "с".
у Германии срабатывает тригер 2015. :

...
action_a = {
name = "ACTIONNAME2015A" # Refuse alliance, but stand by pact
ai_chance = 95
command = { type = relation which = SOV value = 5 }
command = { type = trigger which = 2603 }
command = { type = addcore which = 307 }
command = { type = addcore which = 306 }
command = { type = addcore which = 305 }
}
action_b = {
name = "ACTIONNAME2015B" # Let the world tremble!
ai_chance = 5
command = { type = relation which = SOV value = 15 }
command = { type = alliance which = SOV }
command = { type = dissent value = 20 }
command = { type = domestic which = freedom value = -1 }
command = { type = trigger which = 2602 }
command = { type = addcore which = 307 }
command = { type = addcore which = 306 }
command = { type = addcore which = 305 }
command = { type = relation which = ENG value = -30 }
command = { type = relation which = USA value = -30 }
command = { type = relation which = FRA value = -30 }
}
}

выбираем вариант "b"
все))