The Army is due to receive more than half of a $99.7 billion supplemental funding request prepared for Congress by the Pentagon, according to documents and sources.

The Army’s share includes more than $18.5 billion for operation and maintenance costs covering the active Army and the National Guard and Reserve.

The service is also slated to receive $20.8 billion for procurement, with more than one-fourth of that total ($5.4 billion) earmarked for tactical and support vehicles, which are being used up at historic rates in Iraq and Afghanistan.

The supplemental request figures are included in a program budget decision, No. 711, covering the fiscal year 2007 “global war on terror” supplemental request, expected to be submitted to Congress in February.

The Pentagon comptroller approved the PBD on Dec. 7, according to sources familiar with it.

Operations in Iraq and Afghanistan account for the vast majority of the funding included in the supplemental. According to the document, reviewed by InsideDefense.com, the PBD allots $41.5 billion for operations -- mostly personnel expenses, including pay -- $26.7 billion for reconstitution; $10 billion for force protection; and $9.75 billion for Iraq and Afghan security forces.

A total of approximately $3.7 billion is set aside for Army and Marine Corps brigade and regimental combat teams; another $2.5 billion is earmarked for efforts to defeat improvised explosive devices.

The Army, which has made its desire for more funding very public in recent months, is the unsurprising winner of the most money in the supplemental request because its forces are widely acknowledged as overly stretched by commitments in Iraq and Afghanistan. Last week, Chief of Staff Gen. Peter Schoomaker told a commission on the National Guard and reserves that the service was underfunded by the Bush administration in recent years, leading to readiness shortfalls.

“Frankly, we entered this war flat-footed,” he said. “Investment accounts were underfunded in the Army by approximately $100 billion, resulting in nearly $56 billion in equipment shortages across the Army.”

In recent weeks, the service submitted a revised budget plan to the Office of the Secretary of Defense that included more than $3 billion in cuts to the Future Combat System, as well as numerous program terminations and decrements -- all moves the service insists it was forced to make because it has not received sufficient funding from the White House and the Pentagon.

The service also issued a stark warning of serious risks to the future of the force, according to sources and documents.

Some relief is due from the supplemental, assuming the new Congress approves it next year. In particular, the service is expecting a major procurement boost to replace, repair and “reset” equipment lost or damaged in operations abroad. The $20.8 billion in procurement funding set aside in the PBD includes $5.4 billion for vehicles, primarily trucks, as well as $3.9 billion for wheeled and tracked combat vehicles -- a funding account traditionally dominated by Strykers, Bradleys and Abrams tanks, all of which are in heavy use.

Other procurement accounts are also due for infusions of cash, according to the PBD. It sets aside $691 million for Army aircraft, $861 million for missiles and $681.5 million for ammunition.

The PBD does not break down where the funding would be spent within the procurement accounts.

As for the other services, the Air Force receives the second-largest chunk of operation and maintenance money in the PBD, with $7.7 billion set aside for the active-duty force. The Navy’s O&M allotment is $3.8 billion, the Marine Corps’ $1.3 billion.

Procurement coffers for the Air Force would be increased by more than $5 billion, with most of that money -- $3.9 billion -- slated for aircraft replacements, modifications and support.

Navy aircraft procurement money in the PBD amounts to approximately $3 billion; total Marine Corps procurement money is $2.2 billion.

A total of $34 billion is earmarked for service and defense-wide procurement programs.

Each of the services is slated to receive some research, development, test and evaluation money, as well: $1.6 billion for the Air Force, $483 million for the Navy and $164 million for the Army.

Bloomberg News reported details on the supplemental request earlier this week.