Hello. Sorry for the late reply. Unfortunately, I cannot open your screenshots. The agreement<assassines activation Chance>  is what the name means! it is a chance, meaning it pops  up randomly.  To its fullest, it has a 30% chance of being activated, and this 30%, is with every set of political attacks, meaning it might not be activated at all, or it might activated all the times. To have 0 losses, you have to have as many defences as your mamertines can protect, meaning 100% protection and NOT 90%. You should produce more mamertines, or send to Acropolis all the defences that your mamertines cannot protect, or else you will have losses.  The political attacks  focused on our unprotected units, and not on all of the units that are protected by our mamertines, so yes, the losses are always high if it is not 100% protected.  100% chance is only if your mamertines cover 100% all of your units, Of course, if you think it is a bug, please contact the Support here   . As a player to a player, I would advise you to have some offensive units out like swordsmen, or your heroes.  

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Hello,

I'm aware I had 90% protection and not 100%, so I do expect the few losses that I usually have, but my problem is that at times, the losses are 10 times greater than they should be WHILE THE PROTECTION IS ACTIVE (I have a 100% chance of being 90% protected, and the icon that says the elysian ability is active shows everytime, as it should).

So there is no defense that isn't 90%-protected by my mamertines, hence this post.

It happened several more times since this post, with the losses being concentrated on one type of units or another, with no apparent reason : here is a normal attack with
90% protection (https://prnt.sc/DPeJxEZrRzLZ), (15 pezos lost, 9 mamertines, 18 phalanx) followed by 2 attacks where my protection was not applied to mamertines once (https://prnt.sc/pqNK1wWqqE6x) (15-94-18) and to phalanx the other time (15-9-176). 

(By the way, why do you advise me to keep off outside ?)