mmhh...could tie the sent units to the same era (or later) like the prereq tech. Might be the easiest.
I would definatly atleast make sure that it does not happen in the ancient era.
If someone else has a suggestion for an event by all means use their idea, but I got two I think are good that I dont want to forget
-India wants to build a highway(or railroad, road etc) between one of their cities and one of yours. Assume you are the Germans
*Let them in right away and ensure that it is the fastest highway (or raildroad, road etc) in the world! (-100 gold, requires open borders already between the two civs, all of those plots +1 movement, +1 relation between civs, builds raod between cities. I dont know if +1 movement can be done)
*Definatly! But to let in their workers we will need to sign an open borders pact (Requires no open borders to start with, starts open border between two civs, builds road)
*Tell them we will let them build it, then capture their workers! (+1 worker, - relation between civs)
*We will never work with the Indian Empire!
Plays message "The Indian Empire is hoping to build the great Indian-German highway."
-The Indian Empire wants to join civilization with us. (Required that neither civ is top 3 in score[Since superpower would not do this, and to restrict it from happening in small games], neither can be vassel, Indian civ can not be player, etc)
*Conjoing our empires is a great idea! (All of India becomes Germany, culture and units and everything. German civ renamed to "German-Indian Empire", all other things renamed as well.)
*We are to strong to be dragged down by the Indian Empire, but possibly they would be interested in becoming our vassel (10% chance India becomes Germany vassel)
*Absolutely not.
Also quick question. Do you think that your event for spawning a war would be less taxing on game preformance then a python check each turn to check for a scenario then gameturn? Since when I got 20 scenarios in the future I don't want to be running 20 checks a turn so do you think the events are a better option?