I copied and pasted your code exactly how it was posted. I double checked and their is a player named "Russians" exactly. But i still get the error message...
Could not parse:C:\Users\Grizzly\triplea\maps\stompinggrounds\games\ww2v2.xml
games.strategy.engine.data.GameParseException: No setter for attachment option. Setter:player Class:games.strategy.triplea.attatchments.UnitSupportAttachment
I downloaded the prerelease again this morning so i know its the newest version.
When i delete this line
<option name="player" value="Russians"/> the error message goes away but no support effects occur.
Im creating a map, and the whole idea is based on multiple support abilities.
I know the priority right now is europe and pacific 1940, but these support charateristics have so much potential to add variety to games.
Any help is much appreciated :)
If so, is this something you can code into your map/scenario .xml, or is it coded elsewhere?
The reason I ask is that I'm working on an ancient scenario, and I want to encourage the use of combined arms, i.e. infantry with archers/missileers and cavalry for the 'trifecta' bonus. Missile bonuses are done easily enough through artillery bonuses, but combining cavalry with infantry, I'm not seeing a tag for currently.
This would also apply to a 'Fortress America' style scenario, where there is a combat bonus if air, armor, and infantry units attack together.
In my case, I'm thinking the infantry provides the cavalry with a bonus when used together (the infantry forces the enemy to face them, exposing the flanks to cavalry attacks), but there are a number of arguments both ways. I'd probably be using a D10 for combat, as stacking a +2 on a D6 value is pretty significant.
You can have Unit A provide +X support to the attack of Unit B, and +Y to the defense of Unit B. X and Y do not have to be 1. X and Y do not have to be the same. X and Y can also be negative. Unit A can affect as many Unit Bs you want, and not just on a one to one basis. If you want one archer being able to increase the attack of 10 infantry by +3, go ahead.
Look at "generals" and "entrenchments" "fortifications" in Civil War mod for examples of different support options, or look at Pact of Steel 2 for a more detailed tutorial in the XML comments.