The US election poses twin strategic dangers for Ukraine, and for European allies. A Trump administration may attempt to impose a “deal” with Russia. A Harris administration may continue to withhold the support Ukraine needs to win the war (“Ukraine and US warn Kyiv’s troops could face North Korean forces ‘in days’”, Report, October 31).

Both would repeat the mistakes of the 1938 Munich Agreement and would likely lead to a wider war.

In the first scenario, such a deal would be Donald Trump’s Munich. In the second, it would, as Europeans, be our Munich. We can — and must — prevent such an outcome for five principal reasons. First, Russia is not destined to prevail. Russia cannot sustain its war effort at current levels beyond 2025 when it will have exhausted key stocks. It is losing heavy cannon barrels and armoured vehicles at a rate far higher than it can replace.

Second, there is no credible plan for European security after any “ceasefire”. The Putin regime cannot be trusted to keep to a deal. A ceasefire would let Russia reconstitute its forces, putting us at a disadvantage.

Third, failing to win endangers all European allies. A “Minsk III” (or Munich II) agreement would signal weakness and invite coercion upon us.

Fourth, a route to Ukrainian victory still exists. Using new military technology, we can quickly leverage Europe’s industrial capacity to build the capabilities to disable Russia’s war machine.

Fifth, those who want to act, can. A coalition of willing powers could supply Ukraine with what it needs to win and provide Kyiv with real security guarantees. Where they change facts and policy on the ground, others will follow.

In this appeal, we urge willing European capitals to urgently arm themselves with a real contingency plan for any outcome of the US presidential election by collectively enhancing financial and military support to Ukraine, with the focus on a clear theory of victory.

Air Marshal (retd) Edward Stringer
Royal Air Force

Gen (retd) Michael V Hayden
Former CIA and NSA Director

The Rt Hon Sir David Lidington
Former UK Minister of State for Europe and Deputy to the Prime Minister; Chair, Royal United Services Institute (RUSI)

Anton Hofreiter MP
Chair of the European Affairs Committee of the German Bundestag

Professor Sir Hew Strachan
University of St Andrews and Special Advisor to the Joint Parliamentary Committee on the National Security Strategy

Lt Gen (retd) David A Deptula
United States Air Force, Dean of the Mitchell Institute for Aerospace Power Studies

Maj Gen (retd) Mick Ryan AM
Former Commandant, Australian Defence College & CSIS expert

Air Marshal (retd) Greg Bagwell
Royal Air Force

Vice-Admiral (retd) Didier Piaton
French Navy; Former Deputy Commander, NATO Maritime Command, current Associate Professor

Toomas Hendrik Ilves
President of Estonia (2006-16); Professor, Tartu University

Chris Alexander PC
Former Minister for Citizenship and Immigration, Parliamentary Secretary for National Defence and Canadian Ambassador to Afghanistan

Professor Eliot Cohen
CSIS & former Counsellor of the Department of State (US)

Professor Phillips O’Brien
University of St. Andrews and CSIS

Artis Pabriks
Former Foreign and Defence Minister of Latvia

Michael Roth MP
Chair of the Foreign Affairs Committee of the German Bundestag and former German Secretary of State for European Affairs

Konstantin von Notz MP
Chair of the Intelligence Oversight Committee & Deputy Chair of the Green Party Parliamentary Group in the German Bundestag

Thomas Erndl MP
Vice-Chair of the Foreign Affairs Committee of the German Bundestag

Sara Nanni MP
Defence Spokesperson for the Green party, German Bundestag

Sebastian Schafer MP
Budget & Defence Special Fund Committees of the German Bundestag

Edward Lucas
CEPA Senior Fellow & Columnist, The Times

Dr Anna Wieslander
Director for Northern Europe, Atlantic Council and Chair of the Board, ISDP

Nicolas Tenzer
Guest Professor at Sciences Po Paris

Prof Carlo Masala
University of the Bundeswehr, Munich

Żygimantas Pavilionis MP
Deputy Speaker of the Lithuanian Parliament

Marko Mihkelson MP
Chair of the Foreign Affairs Committee of the Estonian Parliament

Benjamin Tallis
Director, Democratic Strategy Initiative, Berlin

James Rogers
Co-Founder, Council on Geostrategy

Paul Mason
Journalist and Author

Larry Pfeiffer
Former CIA Chief of Staff

Dr Rob Johnson
Former Director of the UK Secretary of State’s Office for Net Assessment and Challenge (SONAC); Fellow, Pembridge College Oxford

Mike Martin MP
Member Defence Select Committee, Senior War Studies Fellow, KCL

Professor Stephen Gethins MP
University of St Andrews and UK House of Common

Derk Boswijk MP
Foreign Affairs Committee of the Parliament of the Kingdom of the Netherlands

Chantal Kopf MP
European Affairs Committee of the German Bundestag

Robin Wagener MP
Head of the German-Ukrainian Parliamentary Friendship Group

Senator Ratna Omidvar
Canadian Senate

Senator Stanley Kutcher
Independent member of the Canadian Senate

Senator Donna Dasko
Canadian Senate

Adam Kinzinger
Former member, US House of Representatives

Slawomir Debski
Former Director Polish Institute of International Affairs (PISM) & Visiting Professor, College of Europe, Natolin