President Barack Obama quickly signed the Budget Control Act of 2011 into law this week, averting a possible default on US government debt. But officials at the Pentagon are still in the dark over what funding they can expect, either for this year or for the rest of the decade. Making plans for multiyear and in some cases multidecade programs and missions requires a few reasonably trustworthy assumptions. The debt crisis that still hovers over Washington will prevent those responsible for defense strategy and planning from getting stable assumptions until 2013 -- and maybe not even then. Until those stable assumptions arrive, no one can have much certainty about US defense strategy or what the Pentagon's global military presence and capabilities will be for the rest of this decade. The debt deal did pin down $684 billion in security spending for fiscal year 2012 and $686 billion for fiscal year 2013 (security spending is now defined as spending for the departments of Defense, Homeland Security, Veterans Affairs, and State; the intelligence community, and the Energy Department's nuclear weapons program -- but not the current wars). The White House asserted that the debt deal cuts the Pentagon's base budget by $350 billion over the next 10 years, though as FP's Josh Rogin reported, such a conclusion is little more than a guess. Adding to the confusion is the prospect that the Pentagon will suffer an additional $600 billion in cuts over the next 10 years if the Congress's ad hoc budget "supercommittee" fails to push through a second budget deal by Christmas. Although the threat of an additional mammoth cut to the Pentagon is designed to encourage an agreement on Capitol Hill, this "trigger" is an empty threat. The next Congress in 2013 will set its own policies, and both the political climate in Washington and the geostrategic climate abroad are likely to have shifted. Obama himself, the official most responsible for US security, has spoken out against a second large cut to the Pentagon. But Pentagon officials can't just put important decisions on hold for two years while they wait for solid planning guidance. Defense Secretary Leon Panetta and his lieutenants are assuming that their damage will be limited to the $350 billion described in the White House fact sheet, but relying on this (relatively speaking) rosy scenario may be a poor bureaucratic and political strategy. Further, it assumes that in the subsequent phases of the budget struggle, negotiators will happily ring-fence the Pentagon and focus only on entitlements, other domestic spending, and taxes -- a dubious assumption. Panetta and his colleagues would be wiser to assume a more pessimistic budget scenario. By assuming the worst, it will be easier to add unexpected windfalls that may later arrive than to soon have to repeat more wrenching strategic and budget reviews. More importantly, assuming a pessimistic budget scenario will afford an opportunity for Panetta and his colleagues to confront policymakers with the strategic implications of that scenario. With the pessimistic budget scenarios undoubtedly resulting in significant cuts to force structure, readiness, and modernisation, planners could then inform policymakers of which current global security commitments they would like to withdraw from. Planners could describe the future crisis responses or stabilisation operations the Army might be too small to handle, the cooperative engagement and disaster relief missions the Navy and Marine Corps won't be able to perform, or the diplomatic strategies US forces will no longer be able to support. Hopefully, the security implications of those outcomes may force some long-neglected reforms in such areas as the Pentagon's health system, its retirement programs, and the supervision of its contractors. Foreign Policy