Those events in Patrol that start with a sub-title at the bottom of the screen. (E.x.; "A roving band of pikes draw near")
I only know of two so far;
-...A roving band of pikes is heading your way. (3 pikes)
-...The enemies are moving against eachother. (full scale swarm war)
Any others?
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Never seen the pikes
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it's just those 2
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"Weasel"