Since February, a large number of classified documents from the US defense headquarters Pentagon have been published on various online forums. Who is behind the leak is still unclear – but here's what we know so far..
What do the documents show? Broadly speaking, the leak contains detailed assessments of the situation on the battlefield in Ukraine as well as information on support from Western countries. The Pentagon declined to comment on the authenticity of the documents, citing an ongoing investigation. Ukraine has already reversed parts of its military plans as a result of the leak, a source close to Zelenskyy said.