No enemy training:
Detach squads in your fort until twenty squads have been created. Since the game has a twenty squad limit, you opponent will not be able to train more men.

Retreating archer attack:
Have your archer to fire a volley of arrows, then retreat. The arrows will continue towards their target after your squad has left the screen.

Screen capture:
Press [Command] + [Enter] to save the current screen in PICT format.