In four weeks of combat, Russia may have lost 25 percent of its initial attacking force. These casualties are not on the scale of World War II but are large compared with the relatively small size of the Russian military today. Although reinforcements and replacements can offset some of these casualties, the loss of trained troops will impair military operations and eventually have a political effect. Russian losses to date are high. NATO estimates that Russia has lost between 7,000 and 15,000 soldiers. Wounded who cannot rapidly return to duty generally number about twice the number of dead. That would...