What Today’s Leaders Can Learn from the Allied Leadership of WW2

What a note Eisenhower hoped never to send reveals about leading under pressure

On the evening of the 5th of June 1944, with the largest seaborne invasion in history already under way and beyond recall, Dwight Eisenhower sat down and wrote a short note to be released only if it failed.

It is worth knowing exactly what it said, because the character of the man is in every line. He wrote that the landings had been called off — he had drafted it as though the worst had already happened — and that the troops had been withdrawn, and then he wrote the sentence that matters: that if any blame attached to the attempt, it was his alone. He took full and sole responsibility, in advance, for a catastrophe that had not yet occurred and that he was praying would not. Then he folded the note, put it in his wallet, and went to watch the paratroopers board their aircraft. He did not have to write it. No one would have asked him to. The plan had been argued over by dozens of senior commanders; the weather was marginal at best; the intelligence was imperfect; the decision to go had been genuinely collective. And yet, on the eve of the gamble, Eisenhower privately resolved that if it went wrong the failure would belong to him and to no one else.

That note is, to my mind, the single finest artefact of leadership the war produced, because it captures something that the speeches and the strategy and the famous photographs do not. The willingness to absorb the consequences of a decision in advance — before you know how it turns out, when owning it could only cost you — is what earns a leader the right to make the decision at all. Eisenhower understood that authority and accountability are the same thing seen from two directions, and that you cannot claim the first whilst dodging the second.

The Second World War remains the largest collaborative endeavour in human history, and we rightly remember it for its scale of sacrifice. But there is another dimension worth returning to: the leadership that held a fragile and improbable coalition together long enough to prevail. The Allied victory was not inevitable. It was engineered — politically, militarily, and personally — by a handful of leaders who, for all their considerable flaws, made consequential decisions under conditions of extraordinary uncertainty. And the problems they wrestled with, beneath the period detail, are strikingly modern: building trust across differences, aligning competing interests, communicating under pressure, and making hard calls on incomplete information. Eisenhower’s note is where I want to begin, because the qualities it reveals — accountability, composure, the courage to decide without certainty — run through the whole story of how the war was won.

Take the decision itself, before we even reach the accountability. Eisenhower ordered the landings into a weather window that a meteorologist had identified as a brief, uncertain break in a storm, knowing the intelligence was imperfect and the consequences of error incalculable. He did it because he grasped a truth that paralyses lesser leaders: perfect information never arrives, and waiting for certainty is not caution but a decision in itself — usually the worst one available. The window would not hold for the leader who wanted to be sure. So he weighed the best evidence he had, decided, and committed, and then did the thing that made the commitment legitimate: he built in the ability to adapt, because Allied planning consistently assumed the plan would not survive contact and prepared contingencies accordingly. A good decision under uncertainty is not one that assumes the plan will hold. It is one that anticipates it will not, decides anyway, and stands behind the choice. For any modern leader waiting for the data to be complete before they act, this is genuinely liberating: the job was never to eliminate risk, only to weigh it honestly, decide, and own the outcome.

That ability to decide and own depended, in turn, on a discipline most accounts of these men underplay — the deliberate, unglamorous management of relationships, because the coalition that did the deciding should never have functioned at all. A liberal empire, a capitalist republic and a communist dictatorship had almost nothing in common beyond a shared enemy, and that the Grand Alliance held together is a masterclass in coalition management rather than any natural harmony. It held because the relationships were invested in before they were needed. Churchill and Roosevelt exchanged well over a thousand personal messages across the war and met repeatedly, building the kind of rapport that creates enough trust to disagree productively — and when Churchill appealed for American support, he framed it not as a transaction but as a bond, asking for faith and blessing rather than merely for materiel. The alliance also held because its leaders accepted that partners carry their own pressures: Roosevelt understood that Stalin’s relentless demand for a second front was driven by catastrophic Soviet losses on the Eastern Front, and acknowledging a partner’s reality is not weakness but the very basis of negotiation. It even held against the pull of public mood — throughout 1942, more American forces were actually deployed against Japan than against Germany despite a formally agreed “Germany first” strategy, and holding a coalition to its agreed priorities against that kind of pressure is a constant, active act of leadership rather than a one-time agreement. This is, in my view, the most under-appreciated leadership lesson of the war. We treat alliances — with partners, suppliers, internal departments — as transactional, to be activated when required. The Allied experience suggests something more demanding and more true: the relationship is the strategy, and it has to be built before the crisis that will test it.

If relationships were the foundation, communication was the instrument, and here the war offers its most famous lessons in a form that is easy to admire and hard to practise. Churchill is remembered as one of history’s great communicators, but his speeches were not merely stirring; they were instruments of policy, engineered to sustain a nation’s morale through its bleakest months. What made them work was that he never pretended the situation was anything other than dire — he named the danger honestly and then offered a credible path through it, and it was precisely that honesty that made people believe the resolve. Tell the truth, then offer the way forward; the truth is what earns the right to be believed about the rest. There is a humbling footnote, too, for anyone who imagines great communication is effortless: even Churchill was not immune to a poor delivery, and the broadcast of one of his most celebrated speeches drew complaints that he sounded tired and unconvincing — a reminder that how a message lands can undercut what it actually says. Roosevelt, for his part, understood repetition: his fireside chats returned again and again to a small number of consistent themes, because repetition is not condescension but the way a message survives in a noisy world. The lesson for today is direct and frequently ignored. In a crisis — a major incident, a restructure, a failed launch — the temptation is always to obscure the bad news. The Allied example argues the opposite: candour, paired with a clear plan and delivered with conviction, builds the very trust an organisation needs to come through the storm.

The war also offers one of the clearest natural experiments in leadership ever staged, in the contrast between how the two sides handled command. Hitler increasingly micromanaged his generals, overriding professional military judgement from a distance with results that grew steadily more disastrous. The Allied leadership, broadly, did the opposite — and the contrast is the lesson. Eisenhower, as Supreme Allied Commander, assembled leaders from different nations and backgrounds, gave them genuine authority, and was quick to credit their contributions; the trust placed in him, and the trust he in turn extended downward, was repaid on the beaches. Patton put the underlying principle memorably, observing that you should never tell people how to do things — tell them what to do, and they will surprise you with their ingenuity. Leaders set the strategic intent; the experts determine the execution. And the hardest part of this is resisting the urge to intervene, because the temptation to “help” by overruling a specialist is strong and almost always counterproductive — knowing when not to act is itself a leadership skill, and the price of getting it wrong is written across the German command’s growing paralysis under a leader who could not leave his generals alone. This maps cleanly onto modern technology and service organisations, and the leaders I most admire are precisely those who set a clear direction and then trust their engineers, architects and service managers to deliver, rather than dictating the how from above.

It is tempting to read these men as natural winners, and the more useful truth is the opposite. Churchill’s career very nearly ended in disgrace at Gallipoli in 1915 — a campaign he championed as First Lord of the Admiralty that became one of the great military catastrophes of the First World War and forced him from office. His later judgement and decisiveness were forged, in part, by that disaster, which is the point worth holding onto: people are not failures, though they sometimes fail, and the leaders who recover from a public failure often emerge with a clarity that those who never stumbled simply lack. Eisenhower’s own counsel ran in the same direction — that you should always associate with, and learn as much as you can from, those who know more than you, who do better than you, who see more clearly than you — which is confidence and humility held together rather than treated as opposites. A single failure, honestly metabolised, can become the foundation of credibility rather than its ruin. I am always conscious that a career, like a campaign, is rarely a straight line, and that some of the most capable people I have worked with carry a notable failure in their history. It tends to be the thing that made them.

There is a related myth worth dismantling — the wartime leader as a figure of superhuman, effortless fortitude — because the reality is more human and far more instructive. Churchill battled the depression he called his “black dog” throughout his life whilst projecting, to a nation that desperately needed it, a public confidence he did not always feel. Composure under pressure, in other words, is not a gift bestowed on the lucky few; it is a practised discipline, sustained through habit and routine and sheer force of will. Optimism, the war’s leaders understood, is contagious — and so is its absence — which is why Eisenhower made a deliberate point of being positive and upbeat, treating morale not as an afterthought but as a strategic asset, knowing that a leader’s mood propagates through an entire organisation. They also understood the necessity of protecting their own capacity, because a leader who burns out cannot lead, and what the coalition actually required was sustainable performance across years rather than heroics across days. Leadership, in large part, is an act of emotional regulation, and the wartime generation grasped this instinctively. They led not by being fearless but by managing their fear well enough to keep others moving forward.

The final mark of their strategic maturity is the one most easily forgotten in the relief of victory: the attention paid to what would come after. The conferences at Bretton Woods, Yalta and Potsdam — for all their compromises and later controversies — reflected an understanding that winning is not the same as succeeding, and the Marshall Plan that followed became the defining example of building a durable peace rather than merely ending a war. Victory was never the real objective; a stable post-war order was, and leaders who confuse the milestone with the mission tend to fumble the aftermath. The planning for that aftermath began long before the fighting ended, because the best transformations are designed with the end-state in mind from the very start. And it required accepting an imperfect outcome — the post-war settlement was deeply flawed — yet the willingness to build something durable rather than hold out for the ideal shaped decades of relative stability and recovery. This resonates with anyone who has led a major programme. Delivering the change is only half the task. Embedding it, so that the new way of working actually endures, is where the lasting value is created — and it is the half that gets neglected when the milestone is mistaken for the mission.

Eisenhower never had to send his note. The landings held, the beachheads were secured, and the folded paper stayed in his wallet, eventually preserved as a kind of relic of a disaster that did not happen. But the leadership was in the writing of it, not in the not-sending. He had decided, before he knew the outcome, that he would own the worst version of it — and that willingness, more than any tactical brilliance, is what allowed him to make the call in the first place.

Conclusion

The Allied leaders of the Second World War were not flawless. They made errors of judgement, held views we would now firmly reject, and presided over decisions whose human costs were immense. But the disciplines they demonstrated — building genuine relationships, communicating with honesty, delegating to expertise, deciding under uncertainty, learning from failure, sustaining resilience, and planning for what comes next — remain as relevant in the boardroom and the operations centre as they were in the war room. Leadership, in the end, is less about command than about character. The challenges we face today are smaller in stakes but similar in shape, and the example set eighty years ago — captured in a note a great commander hoped never to send — still has a great deal to teach those of us trying to lead well in uncertain times.