Documents leaked online have painted a detailed picture of Ukraine's war, including sensitive details of Ukraine's preparations for a spring counter-offensive. One of the leaks revealed that the UK is among a number of countries with military special forces operating inside Ukraine. The document confirms what has been the subject of quiet speculation for over a year. The UK has the largest contingent of special forces in Ukraine (50), followed by fellow NATO states Latvia (17), France (15), the US (14), and the Netherlands (1). While special forces are by their very nature highly effective, the numbers of personnel may be small, and will doubtless fluctuate. According to Pentagon officials, the documents are real, and the US government is investigating the source of the leak. The UK's Ministry of Defence has not commented on the leak, but in a tweet on Tuesday, it said the leak of alleged classified information had demonstrated a "serious level of inaccuracy". The British government has a policy of not commenting on its special forces, in contrast to other countries including the US.