I've only seen them after I've cleared Control points (same as supply drops).Originally Posted by H8MyBoss Go to original post
It is not rare. It just activates under certain circumstances. They have a high chance of spawning in "friendly", uninvaded regions. To do this, you need to hold all control points in the given region. They also sometimes use the same spawn locations as the "Supply Drop" activity, so clear those out.
Images of my map currently:
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