History

The first army competition (Military/Eventing/Horse Trail) was held at Strömsholm in 1907, the schedule and rules had been composed by Nils Fischerström, whether this was the first in the world or the first in Sweden is not really clear. Jan Jönsson, bronze medallist in eventing at the 1972 Olympics, read an article in a competition program from Saumur in France where it was claimed that the world's first eventing was held in Strömsholm, Sweden. Why not play with the idea that the world's first eventing has its origins in Strömsholm?
After the war of 1813–14 and during the following years of peace, the cavalry, in Sweden as well as on the continent, had retreated from the terrain to the stuffy air of the riding halls, where they again immersed themselves in artifice and false subtleties and work at shortened paces, forgetting that the conditions of life of the cavalry are speed and youthful, fresh courage to dare everything. And anyone who wanted a brisk ride over obstacles, was often only considered a crude animal tormentor. 
"Races and hunting rides were branded as useless "Anglomania" and were considered to betray the finer art of riding." 
In 1886, the General Baron B. Cederström, who at that time was then head of the Strömsholm Riding School, broke the ice and recommended: Unconditional accessibility In all kinds of terrain, is the conclusion of the training. This led to racing and off-road riding as well as obtaining grants for prizes at races and the organization of trailer hunts, which can most closely be compared to today's Hubertus hunting. 
"Since the end of the 1880s, the development of field/ terrain riding has steadily progressed and the educational program includes: distance rides, races, hunting, individual cross-country riding, swimming, etc."
The schedule for the Military Eventing at Strömsholm 5 – 7 July 1918 when the military riding school celebrated its 50th anniversary had the following appearance: Distance: 30 km. of which 22 km are covered. on road, 5 km off-road and 3 km on the steeplechase course. 
Maximum time: 2 hours for the entire distance, of which 15 minutes for cross country riding and 5 minutes for steeplechase riding.
Military Eventing at Strömsholm 5 – 7 July 1918 was the first eventing at Strömsholm that was international.

The eventing at the 2012 Olympics had the same setup but with slightly longer distances. Furthermore, you can read that the maximum height of the obstacles was 1.30 and the maximum length was 3 meters.

One of the men who made it possible to develop eventing in Sweden ...

Xylografi av Ida Falander

The image is a xylography by Ida Falander