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What Poland's missile defence move meant for Europe
Summary
A look back at Poland's entry into the Anti-Ballistic Missile Coalition, announced days before 22 September 2026.
What did it mean when Poland joined a European effort to build joint anti-ballistic missile defences? The question was live on 22 September 2026, four days after Polish prime minister Donald Tusk announced, on 18 September, that Poland had joined the Anti-Ballistic Missile Coalition.
Tusk said the coalition would develop a joint anti-ballistic missile defence system together with some other European countries.
What the coalition was
The coalition had been established on 13 July 2026 by Denmark, France, Germany, Italy, the Netherlands, Norway, Spain, Sweden, Ukraine and the United Kingdom. Its stated aim was to develop an integrated anti-ballistic missile defence capability for Europe.
Poland's accession, announced on 18 September, came about two months after that founding date and added another country to the group.
The announcement set out the decision to join and the goal of a shared system. It did not, as reported at the time, detail a timetable or the shape of Poland's contribution.
