This is what I see under 3.4.1:
3.4.1 Raid. Raiding places Raider Units and Plunders non-
Friendly Regions and Strongholds. Select up to three target
Regions and/or Cities without Saxon Control, or only one if
this is a Limited Command (2.3.5). Pay all Renown costs before
Raiding any space. Each target space must either:
• Border Oceanus Britannicus or Oceanus Germanicus Sea OR
• Have at least 1 Saxon Warband and 1 Saxon Settlement, or be
Adjacent to a Region with such pieces, or border a Sea itself
bordered by a Region with such pieces.
PLAY NOTE: Use white pawns to mark target Regions.
PROCEDURE: Pay per target space, either 1 Renown point to
roll one four-sided die (1D4) or 2 Renown to roll three (3D4).
NOTE: If free (5.5), pay 0 Renown to roll three dice. Then, for each
such space in turn—
• Roll and place that total of Saxon Raiders there.
• If the Raid used a Patrolled Sea (1.3.7) to reach that Region
(under the first or second bullet above), reduce that number of
Raiders by the total number of Forts (red Strongholds) located
in Regions bordering that Sea.
That seems to be all, even though the player aid has additional instructions ie."If Region, those raiders may take prosperity up to lower of Population...". Also, there is no mention of this in the 3 Errata and Clarifications updates so I must be misunderstanding something. Please help!