Countering China and Russia has become the focus of a new national defense strategy for the United States. Unveiled on Friday, the strategy marks a shift in American priorities from terrorism to challenges posed by Moscow and Beijing. "We will continue to prosecute the campaign against terrorists, but great power competition -- not terrorism -- is now the primary focus of US national security," Defense Secretary Jim Mattis said in prepared remarks at the Johns Hopkins School of Advanced International Studies in Washington. He declared the defeat of the ISIS group in Iraq and Syria, but warned that ISIS, al-Qaida and other extremists continue as threats across the globe. “We face growing threats from revisionist powers as different as China and Russia, nations that seek to create a world consistent with their authoritarian models,” he added in presenting the national defense document. The document, the first of its kind since at least 2014, sets priorities for the US Defense Department that are expected to be reflected in future defense spending requests. The Pentagon released an unclassified, 11-page version of the document on Friday. The so-called “National Defense Strategy” represents the latest sign of hardening resolve by President Donald Trump’s administration to address challenges from Russia and China, despite Trump’s calls for improved ties with Moscow and Beijing. Elbridge Colby, deputy assistant secretary of defense for strategy and force development, said at a briefing with reporters that Russia was far more brazen than China in its use of military power. Russia annexed Ukraine’s Crimean peninsula in 2014 and intervened militarily in Syria to support its ally, Syrian regime head Bashar Assad. Still, Moscow was limited by its economic resources, Colby said. The document reflects persistent US worries about Chinas military build-up in the South China Sea, its moves to expand its political and economic influence around the globe, and what has long been described as Beijings systematic campaign of cyberattacks and data theft from government agencies and private US corporations. Previous defense chiefs have long warned about a rising China -- triggering the Obama administrations move to put a greater focus on the Asia Pacific region, including added ships and troops. And the new strategys call for strengthening alliances sounds more like previous administrations, rather than the "America First" message of Trumps national security strategy that was released in December. “This strategy really represents a fundamental shift to say, look, we have to get back, in a sense, to the basics of the potential for war and this strategy says the focus will be on prioritizing preparedness for war, in particular major power war,” Colby added. The defense strategy explained that competition with China and Russia has threatened Americas military advantage around the world. And it will require increased investment to make US forces more lethal, agile and ready for war. The document also listed North Korea among the Pentagon’s top priorities, citing the need to focus US missile defenses against the threat from Pyongyang, which beyond its nuclear weapons has also amassed an arsenal of biological, chemical, and conventional arms. On whether terrorism is no longer a top priority, Colby said it remains a "serious, pressing threat", and that Iran and North Korea are "urgent problems." The document said that international alliances would be critical for the US military, by far the world’s best-resourced. But it also stressed a need for burden-sharing, an apparent nod to Trump’s public criticism of allies who he says unfairly take advantage of US security guarantees. Mattis said that the US military’s competitive edge has eroded “in every domain of warfare” and blamed that partly on spending caps and congressional budget dysfunction. “As hard as the last 16 years of war have been, no enemy in the field has done more to harm the readiness of the US military than the combined impact” of the caps and short-term funding. In sheer spending terms, the United States’ military outlay per year is still far more than China and Russia, the rivals cited by Mattis. The United States is spending $587.8 billion per year on its military, China $161.7 billion and Russia $44.6 billion.