Practiced Combatant (3.5e Feat)
From D&D Wiki
Practiced Combatant [Fighter Only]
|0 or 1||no bonus|
|2 or 3||+1 bonus|
|4 or more||+2 bonus|
If the character has any other feats, class abilities, items or spell effects that increase BAB, these are counted first before determining eligibility for this bonus. However, the bonus does not stack with magical effects or abilities that replace the character's natural BAB entirely.