Russia’s S-300 missile system can be tracked with publicly available data.
Russian Ministry of Defence / EPA
Public data can reveal military secrets – posing problems for the world’s armies.
EPA-EFE/George Ivanchenko
A selection of our coverage of the conflict from the past week.
Germany’s Leopard II tank: battlefield advantage – at a cost.
EPA-EFE/Filip Singer
The high cost of warfare is not only human – military expenditure on both sides is enormous and will strain defence budgets.