I took a short look to the modding section.
I was not brave enough to edit anything in the Wiki by myself since I would mess everything up for sure...

Wiki wrote:Event structure
SelectFaction
SelectRegion (not required)
StartEvent
Conditions
1 or more conditions
Actions
1 or more actions
EndEvent
The keywords [font="Courier New"]SelectFaction[/font] and [font="Courier New"]Select Region[/font] don't have to be written before the [font="Courier New"]StartEvent[/font]. Actually it might be more clear if they are set in the [font="Courier New"]Action[/font] section, before the commands which require a selected region/faction.
An event does not have to contain conditions or actions. An event without conditions is for example the scenario setup. Events without actions might be used as a kind of counter, there another event checks how often the 'counter-event' have fired.
[quote="Wiki"]
Replacement
Replacement = Faction]
Thanks for correcting the typo, but the keyword is in fact [font="Courier New"]Remplacement[/font] (which is the French word).

Cheers
Norbert