WASHINGTON -- Despite calls on Capitol Hill for major defense budget cuts, the Pentagon this week will unveil the largest budget in its history -- driven by an expanding list of what defines national security.
Defense Secretary Robert Gates said his proposed $553 billion budget "represents, in my view, the minimum level of defense spending that is necessary, given the complex and unpredictable array of security challenges the United States faces around the globe."
Those challenges now include pandemic diseases, piracy, human trafficking, rising oceans, national debt, education, cyber warfare, the wars on terrorism and traditional state-to-state threats.
But defense analysts, budget experts and some members of Congress take a more jaundiced view, saying the insistence that the U.S. fund a military poised to address every type of possible threat not only thwarts efforts to control the deficit, but also makes it difficult to set priorities on what threats the nation really faces.
During the Cold War, the military had to be prepared to fight two simultaneous wars. Now, it must be good at everything.
"The strategy doesn't drive the budget. It's the other way around," said Christopher Preble, the director for foreign policy studies at the libertarian Cato Institute. "What you have is an existing force structure and then Washington trying to figure out how to use it."
Pentagon planning documents show the extent of the problem -- experts said the list of threats the military cites has never been so expansive.
In his annual guidance this year to U.S. troops on what he thinks should be the Pentagon's priorities, Adm. Mike Mullen, the chairman of the Joint Chiefs of Staff, named Afghanistan, China, Somalia, Yemen and Pakistan as areas the U.S. must focus on.
He called for stressing cyber warfare and the health of the force as well.
The Pentagon's quadrennial defense review -- which the military produces, in part, to outline its priorities and shape its budget -- last year called for U.S. forces to be prepared for a range of warfare "from homeland defense and defense support to civil authorities, to deterrence and preparedness missions -- occurring in multiple and unpredictable combinations."
It called climate change "an accelerant of instability," marking the first time such a document linked environmental issues with national security.
On pandemic disease, the report found that "detecting, diagnosing, and determining the origin of a pathogen will enable U.S. authorities to better respond to future disease outbreaks and identify whether they, are natural or man-made. Accordingly, we are expanding the biological threat reduction program to countries outside the former Soviet Union in order to create a global network for surveillance and response."
And on piracy and human trafficking, the review found the U.S. must invest more in "regional maritime security organizations in order to protect vital sea lines of communication."
Doing all that will require 3 percent more money next year, Gates has said, not including spending on the wars in Iraq and Afghanistan. Such a boost would mark the 14th year in a row that Pentagon spending has increased, despite the disappearing presence in Iraq. In dollar terms, Pentagon spending has more than doubled in 10 years. Even adjusted for inflation, the Defense Department budget has risen 65 percent over the past decade.
Gates has proposed some modest trims that total about $78 billion over five years and shrinking by 47,000 the size of the Army and the Marines Corps in 2015.
But the bottom line figure would still go up during that time, with projected spending totaling $643 billion in 2015 and $735 billion on 2020. Even with the reduction in staffing forecast for 2015, the Army and Marines Corps would be larger than they were when the Iraq and Afghanistan wars began.
That approach has angered some and frustrated others.
"It's hard to say (Washington) made tough choices," said Lawrence Korb, a budget expert at the Center for American Progress.