Aerial Maneuvers
The early days of flight was a fascinating and dangerous combination of adventure and experimentation.  Pilots developed and practiced various aerial maneuvers that allowed them to out fight opponents yet maintain control of their plane.  These basic maneuvers are derived from Baughman's Aviation Dictionary and Reference Guide, 1942.
One maneuver learned early on by many pilots is the Advanced Stall.  In this maneuver, a pilot pulls his plane's nose upward at a severe angle of attack.  The objective is to stall the plane and have the nose suddenly drop.  The effect can be enhanced by reducing the throttle.  It can be effective against an enemy diving down from behind at high speed.  By pulling up, you can cause him to overshoot, while at the same time you can drop your nose, making the hunter the hunted!
Another maneuver learned at an early stage is the
Climbing Turn.
  This was later known as a Chandelle, and involves a combination climb and turn with the primary objective to change direction 180 deg. while gaining altitude.  Typically, the maneuver is pulled to the stalling point, where the pilot begins to slowly level out.  It can be very effective after one has made a diving attack and wants to come back for another run.  This should not be confused with the Immelmann, which is much more complex and difficult to perform.
A Snap Roll can be a very effective maneuver to bring a rapid loss in speed while maintaining basic bearing and atitude.  It is performed by pulling back on the stick and at the same time angling the stick either left or right.  If pulled back to far in both directions the plane will typically stall and spin.  However, even this maneuver can be very effective if control is maintained.  It can be effective in getting a fast flying enemy coming from behind to overshoot you, while at the same time you have better control than the advanced stall to recover and attack your enemy from behind.
A Wing Over can be a rapid way to return for another attack.  It is easier to perform than an Immelmann, though not as quick.  The pilot pulls the plane into a moderate climb, and then moves into a half roll.  He then swings the plane down and back in the direction from which he came.  Although a useful maneuver, it must be done at the right tactical moment.  If a pilot does this with a hostile aircraft in position to attack, he will hang in the air at the top of the maneuver, providing an extremely vulnerable target.