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					Originally Posted by lch  Was there some fight in the province he tried moving away from? That might have triggered the drowning after clearing up the battlefield. | 
	
 Sorry, I don't remember if there was a battle in the province in that game, but if there was it would have had to have been a random event.
I just tested this again.  I cannot get any unit to drown after removing water-breathing items, no matter whether the unit sneaks into an enemy province or moves into an enemy province.  I didn't wait around for a random event to steal the water province from me though.