France's Gendarmerie migration (2005–2015)
The French Gendarmerie moved roughly 70,000 desktops from Windows to Ubuntu, building its own open-source email and office tools and bargaining with vendors.
The force cut IT costs and reduced per-seat licensing expenses, with tens of millions of euros saved annually.
The migration held and became proof that very large government fleets can run on Linux.
It is the counter-example to Munich: a government of comparable scale kept Linux working, showing DAWO's ambition is feasible if executed well.
