(Bloomberg) — The Russian Defense Ministry is denying a report by a leading Moscow newspaper that seven Russian warplanes were destroyed in a New Year's Eve attack on the Khmeimim air base in Syria. Two Russian servicemen died in the attack, according to the ministry. Clearly, fighting in Syria isn't over for Russia yet, despite President Vladimir Putin's self-congratulatory conversations with Syrian ally Bashar al-Assad. Recently, however, General Valery Gerasimov, head of Russia's General Staff, made public his post-mortem of the Syrian operation, revealing Russia's military priorities in Syria and its persistent conviction that every conflict in which it is involved is a proxy war against the U.S. That war won't be over even once Syrian violence subsides. In the interview with pro-Kremlin daily Komsomolskaya Pravda, Gerasimov provides the basis for Putin's claims that Russia has defeated ISIS. These claims, of course, compete with those of U.S. President Donald Trump, who has said the victory was his, and those of former U.S. Secretary of Defense Ash Carter, who claims in a recent memoir that Russia was merely a "spoiler" of a winning strategy Carter had devised.

Though neither Russia nor the U.S. can credibly claim a full victory, the current map of Syria leans toward the Russian version: The Assad regime controls most of the country's territory, an amazing achievement after barely holding on to 10 percent of it in the summer of 2015. Both great military powers used similar strategies, refusing to put boots on the ground in a major way and relying instead on local forces to do the fighting. "'Lasting defeat required enabling local forces to reclaim territory from ISIS and hold it rather than attempting to substitute for them," Carter wrote. "That meant focusing U.S. forces on training, equipping, enabling, and often accompanying them." It worked only partially for the U.S. -- mainly to the extent that it helped Kurdish fighters, who now control Syria's northern and northeastern areas. Gerasimov, for his part, said Russia focused on assisting the demoralized, fatigued Syrian regime army: "We helped them, repaired their equipment right there on the ground. Today, the Syrian army is ready to defend its territory." Both Russia and the U.S. claim they fought ISIS rather than pursued political goals. But U.S. officials have long claimed that Russian bombing raids targeted anti-Assad rebel groups rather than Islamic State terrorists. In his interview, Gerasimov counters that claim by comparing airstrike numbers: "Look, all this time the international coalition delivered eight to 10 airstrikes a day. Our aviation, with a rather insignificant force, delivered 60 to 70 airstrikes a day on militants, on infrastructure, on their bases. At times of the highest tension it was 120 to 140 strikes per day. That was the only way to break international terrorism's back in Syria. As for eight to 10 strikes a day... Well, perhaps the coalition's goals were different. The goal they mainly set for themselves was to fight Assad, not ISIS." In reality, though, it would be fairer to say that both Russia and the U.S. pursued multiple goals in Syria. In the final stage of the conflict, it became more important for the U.S. to defeat ISIS than to displace Assad: It was a major domestic political issue because of ISIS-inspired terror attacks in Europe and in the U.S. itself. For Russia, both defending the Syrian dictator as a reliable ally and beating ISIS apparently played second fiddle to the goal of battle-testing its recently reformed and rearmed military. Gerasimov's interview reveals a hunger to put as many people and systems as possible to the test in this one conflict. According to Gerasimov, the only previous time Russia had to deploy troops so far from its borders was to Cuba in 1962, so it was important to test that capability. The general says Russia ran 48,000 service members through the Syrian war theater. "The main thing was to test the commanders, the officers," Gerasimov told Komsomolskaya Pravda. "We had all the commanders of the military districts spend quite a long time there." That explains why Russia rotated the Syrian operation's commander so often, using five generals to run the military action between September, 2015 and the end of 2017. According to Gerasimov, the command structures of 90 percent of Russian divisions and more than half of regiments and brigades underwent battle testing. Officers were sent to Syria on a three-month rotation plan, and Gerasimov had high praise for their performance.