Can a raid combat token be placed in a province where a peace token is already placed? The rule book states that such a province cannot be "attacked". So does a raid qualify as an "attack"?

Found the answer to this question, under Special Tokens on page 10 of the rule book. "Special tokens remain on the board for the duration of the game. These include scorched earth tokens, peace tokens and a variety of tokens that are placed by territory card effects."

The description of peace tokens on page 10 is clear about that (emphasis mine)

Quote

Peace If a province contains a peace token, that province cannot be attacked and the player who controls it cannot attack adjacent provinces from the peaceful province. Players cannot place combat tokens in a province or on a border of a province that contains a peace token.

There are several ways to remove a peace token, so the rule you mentioned doesn't mean they are completely protected. It just ways that they don't expire or leave play on their own.

Thank you for pointing that out! That particular rule is clearly the more pertinent of the two.