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.