Ok this one may be some serious rules lawyering so I apologize for any arguments this may cause beforehand.

Situation: A flotilla ends it's movement at distance one of three mine tokens. The first two tokens destroy the flotilla. Does the third mine also get removed?

here is what it states in the minefields:

"If a ship ends its movement at distance 1 of an objective token, remove that objective token from the play area and roll 2 blue dice. That ship is dealt 1 facedown damage card for each hit or crit icon rolled. If there is at least 1 crit icon, deal the first damage card faceup. "

So the RRG states under destroyed ships page 4:

"Destroyed ships and squadrons are no longer in play. All ship and upgrade cards belonging to destroyed ships are inactive. All squadron cards belonging to destroyed unique squadrons are inactive. Squadrons cards for destroyed non-unique squadrons are inactive when the last non-unique squadron of that type is destroyed."

Now under effects use and timing on page 4 it states:

"If two or more of a player’s effects have the same timing, that player can resolve those effects in any order."

"When a card is discarded or flipped facedown, its effect is no longer active in the game."

So can argument be made that once the ship is destroyed it leaves the play area and does not trigger the effect of the third mine. Because as stated above the player can resolve multiple effects with simultaneous timing in any order, And once a ship is destroyed it is no longer in play and it's ship card and upgrade cards are discarded thus cannot trigger anymore game effects. Therefore the third mine would not trigger as the player controlling the mines can resolve the first two mines and the result is the ship is destroyed and removed from the table before the player has to trigger the third mine.

Every mine is removed. The trigger is not "if there is a ship at distance 1 of the token," it's "if a ship ends its movement at distance 1."

The trigger already happened by the time the ship is destroyed, you're just determining the order of resolution.

To put it differently: the minefields trigger does not check for the presence of the ship. It only checks for whether a ship ended its movement in range. That event happened regardless of the state of the ship when the mine goes off.

Interesting. I first thought it would remain because it needs a target but... Ard is right. The mine has had a trigger and it is not optional.