I’m finding that diplomacy is a great way to play enemies off each other. In my current game as the Iroquois, after the early expansion and exploration phases, I found myself bordered on the south by France, on the southeast by America, and on the northeast by Arabia. I had 1 friendly militant city-state to my west, one irrational militant to my northwest, and two hostile city-states to my south and southeast.
I initially had open borders with France and America, and a secrecy pact with America against France. Arabia declared war on me quickly, and although I drove them back, I lost about half my military strength in the progress.
France took the opportunity to declare war on me and invade with a large army, and they allied with the southern city-states, as well. I managed to ally with my western city-state, and between them and spending all my remaining money on troops, I barely held my own. Just as I had forced a peace with France, American declared war against me.
Luckily, my wars with Arabia and France had forced me to build up a strong, experienced army, and I managed to just wreck America’s armies. I had to act quickly, though, while the peace treaty with France was still in effect. Soon enough, though, France had resumed the war, and I now faced a two-front war.
My navy, unfortunately, was trapped on the other side of the world, where it made contact with China, India, and Siam.
Things went my way, though, as Arabia was bordered tightly against America, and there was plenty of expansion tension. Arabia and I quickly joined against America, although I had to divert most of my army back to the French front.
The French were doing quite well with their damned Musketeers against my Knights, Longswordsmen, and Crossbows, but luckily America offered a HUGE peace offering - 5 cities, open borders, a pile of cash, and bunch of resources.
I accepted, but then took a massive happiness and cash hit from the influx of 5 new puppet states. This is where the diplomacy worked out - I traded one city to China in return for cash and luxuries and one city to Arabia for cash and luxuries. Soon, both China and Arabia were joined against the French because France was now pushing up against THEIR newly acquired cities.
France offered me a pile of concessions for peace, as it was now in a 3-front war, and I accepted, only to see Arabia turn on me and China. Arabia was getting too big, so I now traded my smallest American-puppet city to France, and it worked to embroil France against Arabia. Also, my navy worked its way back to my continent, and really started laying into enemy troops with coastal bombardments.
It’s now the early 1900s, and I’ve managed to purposefully keep my empire limited to about 10 cities, with a strong military, excellent relations with China across the sea (and on a foothold on my continent), and a (finally) relatively controlled border with France, America, and Arabia. The lesson I learned is that in this case, the best way I’ve found to deal with numerous hostile, warlike enemies is to play them all against each other for as long as possible. Even if it involves pulling in powers from the next continent over.