Reward: the felled titan's hull enters a recovery-track that takes a full campaign-cycle of Sacristan labour to walk again; the Household gains no cheap replacement, but the hull may be recovered a cycle faster by winning a Salvage the Fallen scenario, and each war-engine walked back to war grants the gang a permanent Reputation mark - the march remembered
The Long March of the Household — a Knight gang does not recruit between battles; it marches one war-engine at a time. The sub-plot triggers whenever a war-engine of your gang is taken Out of Action and lost or crippled in a campaign battle.
The felled titan's hull enters a recovery-track, and a full campaign-cycle of Sacristan labour must pass before it strides to war again — there is no cheap replacement to be bought. But the march remembers its own: you may recover the hull a cycle faster by winning a Salvage the Fallen scenario, and every war-engine walked back into the lance earns your gang a permanent Reputation mark. It is attrition you cannot afford and cannot out-run — and the honour of enduring it anyway.