1 Chronicles Chapter 20

Joab takes Rabbah, David brings out the spoil.

2024 - This appears to have happened in the year following the whole Arameans and Ammonites campaign.  Joab defeated the mercenary Arameans first at Medeba and then east of the Jordan.  Meanwhile, the Ammonite initiators of all this had hidden inside Medeba.  Apparently the majority survived the battle.  So the next year, Joab goes out to make the Ammonites pay for all the trouble they've caused.

1 Chronicles completely ignores the story of David and Bathsheba.  It makes no reference to it at all.

2025 - There is also no reference to the revolt and conspiracy of Absalom and all that went with that. 

After Ammon falls, war breaks out with the Philistines.  Is this part of the curse on David that the sword would never depart?

There are three battles referenced.  Each time, the Philistines are led by one descended "from the giants".  I always thought these were those born of the union of angels with human women.  But it doesn't seem to really imply that here.  One of these giants was the brother of Goliath, and I don't think there's anything implying that Goliath was the son of an angel.  Apparently, somehow, somewhere along the way, there were some genetic giants, and they were able to pass on giantism to their descendants.

This is interesting, in that there were no giants on the ark.  These arose after the flood, perhaps resulting from genetic mutations after the atmosphere changed and damaging particles from the sun could reach earth.  No giant women are mentioned.  But it would seem that there had to be some.  Here is the last verse about them:

8 These were born to the giant in Gath, and they fell by the hand of David and by the hand of his servants. [1Ch 20:8 NKJV]

This looks like all of the giants were descended from one giant...no, Sippai, the first one named, was descended from "the giants", not "the giant".  So there were more than one or two.