Ukraine War Plans Leak Prompts Pentagon Investigation

“Whether these documents are authentic or not, people should take care with anything released by Russian sources,” said Michael Kofman, the director of Russian studies at CNA, a research institute in Arlington, Va.

One of the slides said 16,000 to 17,500 Russian soldiers had been killed while Ukraine had suffered as many as 71,500 troop deaths. The Pentagon and other analysts have estimated that Russia has suffered far more casualties, and that closer to 200,000 soldiers on each side had been killed or wounded.

Nonetheless, analysts said parts of the documents appeared authentic and provide Russia with valuable information such as the timetables for the delivery of weapons and troops, Ukrainian troop buildup numbers and other military details.

A document labeled “top secret” offers the “Status of the Conflict as of 1 Mar.” On that day, Ukrainian officials were at an American base in Weisbaden, Germany, for war game sessions, and a day later, Gen. Mark A. Milley, the chairman of the Joint Chiefs of Staff, and Gen. Christopher Cavoli, the supreme allied commander for Europe, visited the sessions.

Another document includes columns that list Ukrainian troop units, equipment and training, with schedules for January through April. The document contains a summary of 12 combat brigades that are being assembled, with nine of them apparently being trained and supplied by the United States and other NATO allies. Of those nine brigades, the documents said that six would be ready by March 31 and the rest by April 30. A Ukrainian brigade has about 4,000 to 5,000 soldiers, analysts said.