Attacking ! 
Details for attack, assault, paradrop, board and lboard
Damage   
How much damage stuff does
Fallout   
The long lasting effects of nuclear war
Flak * 
How flak works
Hitchance   
The chance of a projectile hitting its target
assault * 
Attack coastal sector from ship
attack * 
Sector vs. sector combat
board * 
Board enemy ship
bomb * 
Dispose of inconvenient enemy assets with air power.
fire * 
Fire artillery from sector/ship/unit on sector/ship
lboard * 
Board enemy land unit
paradrop   
Attack a sector from the air
pboard * 
Board enemy plane
spy * 
Snoop on adjacent enemy sectors
strength   
Report defensive strengths of sectors
torpedo * 
Slip a torpedo to some poor sucker (from a sub or ship)
For info on a particular topic, type "info <topic>" where <topic> is one of the topics listed above. Topics marked by * are the most important and should be read by new players. Topics with unusually long info are marked with a !.