The primary initial concern is border fortification. There's the very powerful Sassanids to the East (start attacking from the start) and the hordes are rapidly approaching from the south (start attacking from c. 20-30 turns in).
Fortunately the borders are easily defended. I typically form border forts garrisoned by a large force on all river passages in these areas to hold off the foes once they arrive and begin attacking. If you can hold these positions and prevent the enemy from breaking through then you are almost totally safe. If they do break through, things do get a little more difficult. The massive hordes especially often cannot be easily held off, so at times you may end up having to sacrifice your eastern most European cities and take them back later when the horde starts occupying (and henceforth disbanding its troops automatically as it does so). That's a tactic you may have to use frequently in the case of BI hordes - united they're unstoppable, but if you give them time to divide and spread after settling down, then they are much easier to destroy.
It also may be advisable to note that BI horde factions automatically re-horde if their last settlement is taken, so it can be wise to leave them with at least one, preferably poor, settlement to prevent this from happening.
BTW, posts split from it's parent thread to form a new thread. I've done this since this is a different topic to what was discussed in the parent, and probably would do better in its own thread.
Bookmarks