Final answer:
Achilles mentioned that wolves and lambs cannot agree to the rules of engagement, illustrating the irreconcilable nature of some conflicts.
Step-by-step explanation:
According to Achilles, wolves and lambs cannot agree to the rules of engagement. This is a metaphor suggesting that two enemies, by their very nature, cannot come to terms on how to conduct their conflict, as they are inherently at odds with each other. The deeper meaning behind this metaphor may be related to the idea that some conflicts are irreconcilable, and no amount of negotiation can change the innate opposition between certain forces or groups.