With a PoD at 1840, have a Cold War last in Europe for at least fifty years with several equivalents to the 20th Century Cold War we had in real life. This would include weapons build up (maybe chemical weapons?), technological achievements (reaching the north and south poles), and trying to spread ideologies counter to each other throughout the world (I'm thinking republicanism and Enlightened Despotism). You don't have to use any of my suggestions.
Who would the sides be? What would the result be? When do you think it'd go hot (if it did)? What major events would change or never happen?
Who would the sides be? What would the result be? When do you think it'd go hot (if it did)? What major events would change or never happen?