WASHINGTON, D.C. ? President Bush would spend a quarter of the $50 billion down payment he wants for next year’s Iraq and Afghanistan war costs to replace damaged weapons and equipment, while an additional $3 billion would go to train and equip Iraqi and Afghan forces.

A document detailing the plan proposes spending $2.3 billion for new armor for troops and vehicles and efforts aimed at thwarting missiles. Another $2.1 billion would be for protecting troops from roadside bombs.

The summary provides a detailed look at how the Pentagon envisions distributing the $50 billion Bush has requested for the initial months of the government’s 2007 budget year, which starts Oct. 1.

The money is expected to tide over the military until another war spending request can be delivered to Congress, probably around February. Costs for the Iraq and Afghanistan wars since 2001 are approaching half a trillion dollars.