A horse and rider pair can also be eliminated for going off course, for example missing a fence.
If the horses shoulder and hind-quarter touch the ground, mandatory retirement is taken and they are not allowed to participate further in the competition.
Eventing was previously known as Combined Training, and the name persists in many smaller organizations.
The term "Combined Training" is sometimes confused with the term "Combined Test" which refers to a combination of just two of the phases, most commonly dressage and show jumping.
At the highest level of competition, the dressage test is roughly equivalent to the United States Dressage Federation Third Level, and may ask for half-pass at trot, shoulder-in, travers, collected, medium and extended gaits, single flying changes and counter-canter.
If the rider falls off the horse they are eliminated.
However, in the US this rule is currently being revised for the Novice level and below.
The penalties for disobediences on cross country are weighted severely relative to the other phases of competition to emphasize the importance of courage, endurance and athleticism.
Fitness is required as the time allowed will require a strong canter at the lower levels, all the way to a strong gallop at the higher events.