- 20 nations (Argentina, Austria, Belgium, Bulgaria, Czechoslovakia, Denmark, Finland, France, Germany, Hungary, Italy, Japan, Netherland, Norway, Poland, Portugal, Spain, Sweden, Switzerland, USA).
- New nationswere Hungary, Japan and Argentina-the latter with three civilian riders.
- Absent were Great Britain and the Chilean Jumping team which had competed in Europe the two previous years.
- The major return was Germany – not invited in 1920 and 1924 but now there in full force. In fact the Germans had begun their Olympic preparations in 1925 with a pre-Olympic Eventing test at Oncle Toms Hütte in Berlin Grunewald
- 121 entries (46 in Jumping; 29 in Dressage; 46 in Eventing)
Jumping (46 riders from 16 nations)
Dressage (29 riders from 12 countries)
Eventing (46 riders from 17 nations)
Two of the previous Olympic champions were among the starters. For the champions of 1920, Tommaso Lequio di Assaba on Trebecco, it was the third Olympic start: gold in Antwerp, silver in Paris, now 24th in Amsterdam. Alphonse Gemuseus on Lucette, the Olympic champions of 1924, finished 8th this time. They were the fastest with two penalty points behind seven riders who had gone clear.
The 720m course, with 16 obstacles at a height of 1.25m to 1.40m, was judged too easy. Two jump-offs were necessary to determine the individual medals. In the first one three riders went clear. In the second jump-off some obstacles were raised to 1.60m. Pepita ridden by the Swiss Major Kuhn had a knock-down with the front legs for 4 points; Papillon of Pierre Bertran de Balanda - grandfather to Gilles – had 2 points for a knock-down with the hind legs while Eliot with the Czechoslovakian Capt. Ventura was clear again to win gold. Equally surprising was the outcome for the team medals: Spain (with the Marqués de los Trujillos – the father of José Álvarez de Bohórquez) took gold ahead of Poland and Sweden, the champions of 1912, 1920 and 1924.
For the first time in Olympic history the top three dressage nations – France, Germany and Sweden – took part, as well as the middle group: the Netherlands, Czechoslovakia, Austria and Switzerland. Only Hungary was absent. The test was the same as four years previously but the 10-minute time limit, which had created so many problems in Paris, had been raised to 13 min.
The judging was uneven, both the result of nationalistic views, but also of fundamentally different opinions about Dressage by the three major powers.
At the discussions following the Games several proposals were made: not to count the highest and lowest score of each judge; to deduct 20 points from each score given to a countryman; to have only one judge from a neutral country. None was considered a serious alternative and, until after the judging scandal of 1956, things went on unchanged.
The Eventing programme of 1928 differed only slightly from that of 1924.
- The speed in the steeplechase was raised from 550m/min to 600m/min.
- The time limit for Dressage was raised from 10 to 11min.
- The importance of Dressage was raised from 200 points to 300.
- The Jumping was accordingly reduced from 400 to 300.
- (The endurance kept the points of 1924: A-C-E = 200, steeple = 500, cross = 700).
All in all, Dressage was the most deciding factor in the final placings. Endurance day, mainly because of generous time limits, did not separate the field. The Dutch, already the winners in 1924, took again the two gold medals, along with an individual silver medal. Only three teams finished, mostly the result of eight eliminations on endurance day due to missing flags. The cross country course was so perfectly flagged out that, over flat land, it irritated the riders.