private Color relationColor(Tribe.Relation r)
{
switch (r)
{
case Tribe.Relation.Allied: return Color.LightBlue;
case Tribe.Relation.Friendly: return Color.LightGreen;
case Tribe.Relation.Neutral: return Color.Yellow;
case Tribe.Relation.Hostile: return Color.LightSalmon;
}
return Color.White;
}