From S&T

SAIPAN (S&T 162) 

8.2 If a unit performing a Ground Segment enters its first undestroyed
Fort hex and also ends movement in that hex, two Japanese Reactions
occur in succession. US advance after combat is canceled if a Reaction
occurs.

8.52 Terrain effects on combat are cumulative. If both sides occupy the
same hex, each receives all terrain benefits when fired on.

NB submitted by John Kula (kula@telus.net)
on behalf of the Strategy Gaming Society
(http://pages.about.com/strategygames/), 
originally collected by Andrew Webber 
(gbm@wwwebbers.com)