It’s a cliché of publishing that men over the age of 40 only read military history. In my case it’s not entirely true: I still occasionally squeeze in the odd novel, some politics, even poetry if I’ve drunk too much sweet wine. But it’s true enough that my mind is probably over-furnished with historical-military examples, metaphors, and allusions. And for the last week I’ve been trying to find the correct analogy, from the annals of war, to characterise the battle recently joined by the Writers Guild of America.