When are flags checked

[a_bates]

If I use a FLAG action in my events file to set a flag when is an event that has a CHECKFLAG trigger on that flag going to be triggered. As far as I can see they occur during the A.I.'s turn. Why is this?

eg

@IF
UNITKILLED
unit=settler
attacker=Russians
defender=English
@THEN
FLAG
continuous
who=Russians
state=On
flag=0
@ENDIF

@IF
CHECKFLAG
who=Russians
flag=0
state=On
@THEN
JUSTONCE
TEXT
The Russians sink to murdering innocent civilians!
ENDTEXT
@ENDIF

The text of the second event does not appear until the A.I's turn. Why is the second event not triggered as soon as the flag is set. Can anyone please explain what the exact logic and timing is in all these events.

Thanks in advance,
Adrian

[William Keenan]

Checkflag statements that are not connected to other trigger events, such as unitkilled, seem to be resolved at the end of the turn. End of the turn being after all civs have moved.