Rules FAQ

Kneeling to attack and declaring stealth are simultaneous, so in order to declare stealth with Roseroad Patrol, you need to control a character with the highest STR before you declare attackers (relevant for Robert Baratheon, Daenerys Targaryen, Lord of the Crossing).

Multiple characters can be tied for the highest strength. As long as you control one of them, Roseroad Patrol gains stealth.