Most seventeenth-century cavalry did the same thing in a battle. They charged, they broke the enemy line, and then — reliably, ruinously — they scattered to plunder the enemy camp, at which point they ceased to be a military asset for the rest of the day.
Oliver Cromwell watched his own men do this repeatedly, and it enraged him.1 He would pierce the enemy line, look back, and find his cavalry gone shopping.
The regiment he eventually built did something almost nobody's cavalry did: it retreated in as good order as it advanced.1 Robert Greene uses how he got there as the first illustration of Strategy 7 — and the lesson is not about training.
In the early 1630s Cromwell was a gentleman farmer in Cambridgeshire, and by his own account in serious trouble — a depression, constant thoughts of death.1
Deep in it, he converted to Puritanism, and the change was total. He believed he had experienced direct communion with God, and he came to believe in providence: everything happens for a reason, according to God's will. A man who had been despondent and indecisive was suddenly filled with purpose, and specifically with the conviction that he was among God's elect.1
He became a member of Parliament and a vocal defender of common people against the aristocracy. But he felt marked for something larger than politics — he had visions of a great crusade.
When civil war broke out in 1642 between the king's Cavaliers and Parliament's Roundheads, Cromwell — who had no military background whatsoever — raised sixty horsemen from his home county. He saw the war as more than an opportunity. He saw it as his calling.1
Cromwell turned out to be a genuine military visionary in one respect: he imagined a new kind of warfare built on faster, more mobile cavalry, and in the war's early months he proved a brave and effective commander.1
He was given more troops. And then he discovered the problem that would define his career.
He had grossly overestimated the fighting spirit of his own side. Time after time he led charges that broke the enemy line, only to watch his men scatter to loot. When he tried holding part of his force in reserve for later in the battle, the only order they would reliably follow was advance; in retreat they fell apart completely.1
Greene's summary is the sharp part: representing themselves as crusaders, Cromwell's men were revealed by battle as mercenaries — fighting for pay and adventure. They were useless.1
Made a colonel with his own regiment in 1643, Cromwell broke with the past entirely, and the break was at the recruitment stage rather than the training stage.
From then on he recruited only one kind of soldier: men who, like himself, had experienced religious visions and revelations. He personally sounded out applicants and tested them for the depth of their faith.1
He also broke with a long tradition by appointing commoners rather than aristocrats as officers, and his stated reason is the most quoted line in the account:
"I had rather have a plain russet-coated captain that knows what he fights for, and loves what he knows, than that which you call a gentleman and is nothing else."1
Then he built the culture around them. He made his recruits sing psalms and pray together. He taught them to understand all their actions as part of God's plan — which Greene identifies as the specific check on bad discipline, since plunder is harder to justify when the whole enterprise is providential. And, unusually for the period, he looked after them materially: well fed, well clothed, promptly paid.1
The transformation showed up as observable behavior on a battlefield.
The men rode in tight formation, loudly singing psalms. Approaching the king's forces they broke into what the account calls "a pretty round trot" — not the headlong, disordered charge that every other cavalry unit ran. They held formation on contact with the enemy. And they retreated with the same discipline they advanced with.1
Because they believed God was with them, they had no fear of death — which meant they could march straight uphill into enemy fire without breaking step.1
The military consequence was that Cromwell now had something almost nobody else had: cavalry he could maneuver. Having actual control over his horse, he could use it with flexibility rather than spending it in a single charge. His troops won battle after battle. At Naseby in 1645, his regiment was decisive in the Roundhead victory, and days later his cavalry finished the Royalist forces at Langport, ending the war's first stage.1
Cromwell is generally counted among history's great military leaders, which Greene notes is remarkable given that he learned soldiering on the job.1
But the reading is precise about what he was good at. He was ahead of his time on mobile warfare, and he was not a brilliant strategist or field tactician. His success came almost entirely from the morale and discipline of his cavalry — and the secret to that was the quality of the men he recruited.1
True believers were naturally open to his influence and accepting of his discipline. Each victory made them more committed and more cohesive, which meant he could ask more of them, which produced more victories.
Greene's instruction: pay attention above all to who you recruit. Many will pretend to share your beliefs, and your first real test will reveal that all they wanted was a job. Expertise and impressive résumés matter less than character and the capacity for sacrifice — because recruits of that kind arrive already open to your influence, which makes morale and discipline infinitely easier to achieve. That core then spreads the gospel for you and keeps everyone else in line.1
You're hiring for a team doing something genuinely difficult, and you have two finalists. One is clearly more skilled — better track record, sharper technically, would produce good work from week one. The other is less experienced and obviously, specifically cares about the problem you're solving.
Greene's whole case says take the second one, and the reasoning isn't sentimental. The skilled hire will do good work while the work is going well. The question is what happens in the month when it isn't — when the thing is hard and unglamorous and nobody outside would notice if standards slipped.
That's the moment Cromwell kept losing, and no amount of training fixed it, because the men were solving a different problem than he was. They wanted pay and adventure; he wanted a crusade. Under pressure, everyone reverts to what they actually came for.
The practical version of Cromwell's test isn't a values interview, which people can pass by saying the right words. It's asking what someone did before you were offering anything — what they built, chose, or stuck with when there was no job attached to it. Adventure-seekers and believers are indistinguishable at the offer stage and completely distinguishable in their histories.
Cromwell's recruitment practices, the discipline of his Ironsides, the russet-coated captain quotation, and the regiment's performance at Naseby are all well documented. [POPULAR SOURCE] for Greene's framing.
Open tension: Greene's account isolates one variable — recruiting believers — from a case with several. Cromwell's regiment also had superior pay reliability, better material provisioning, and officers promoted on merit rather than birth, any of which independently improves discipline in a seventeenth-century army. The chapter attributes the result to shared conviction while listing the material factors in passing as supporting detail.
The larger tension, which the chapter does not touch at all: this is a case study in how effectively religious certainty converts men into a fighting instrument, presented purely as a management technique. Cromwell's soldiers marched into fire without flinching because they were sure God was with them, and the same conviction structure produced Cromwell's conduct in Ireland, which is not mentioned. Greene's Strategy 7 explicitly advises giving your cause "a veneer of spirituality" where useful — and the Cromwell case is what that instruction looks like when the belief is real rather than veneered, including the parts that follow from it.
Set this beside Lombardi and the Packers later in the same chapter, and the two solve the identical problem from opposite ends.
Cromwell could not fix the men he had, so he changed who was in the room — he selected for conviction at the door and built from there. Lombardi could not change his roster at all; he inherited a team infected with what Greene calls adolescent defeatism and had to reverse a group's collective personality with the exact people who had created it.
What the pairing produces: Cromwell's route is far more reliable and requires a power most leaders don't have. Lombardi's route is available to anyone and is much harder, because you're working against an existing culture rather than choosing an absent one. Greene presents both as illustrations of morale-building without noting that they represent completely different constraints — and that the first case's lesson ("recruit believers") is useless to a reader in the second case's situation, which is the more common one.
Business → Mission Hiring and Its Failure Mode. Organizations that hire for mission alignment over raw capability are running Cromwell's play, and the strongest versions of it — early-stage companies, advocacy organizations, certain research groups — reproduce his results, including the cohesion under pressure.
The insight the pairing produces: the failure mode is also Cromwell's, and it's structural rather than accidental. A group selected for shared conviction is exceptionally resistant to internal dissent, because disagreement reads as a failure of faith rather than a difference of judgment. Cromwell's army was extraordinarily effective and could not have told him he was wrong about anything that mattered. Mission-selected organizations inherit both properties, and usually only notice the first one.
Psychology → Selection vs. Socialization in Group Behavior. Organizational research distinguishes group outcomes produced by selecting people who already fit from those produced by socializing people after entry, and finds selection effects are generally larger and faster.
The insight: Cromwell independently discovered this the expensive way. He spent his early command trying to socialize mercenaries into crusaders and failed completely; the moment he switched to selection, the problem dissolved. That's a strong practical claim — most leadership effort goes into changing people already present, and the evidence suggests the same effort spent at the entrance would produce more.
Cromwell's men held formation in retreat, which almost no cavalry in Europe could do, and he achieved it without inventing a single training method. He changed who he let in. Everything downstream that looked like extraordinary discipline was a selection decision made at the door, months earlier.