Partial Charges
Q: Looking through the combat chapter, I can't find any references to a partial charge action; there appears to be no way to close with your opponent and make a melee attack in a surprise round.
Page 196, first paragraph. It doesn't have a separate heading, but it's there.
Can You Ready a Partial Charge?
Click on the link above for details.
Combining Overruns with Charges
See Overruns for details.