Fortification Upgrades was an re-organization of military forces and strengthening of the defenses of Norway.

Ulrik Frederik Gyldenløve, Count of Laurvig

Ulrik Frederik Gyldenløve, Count of Laurvig

Ulrik Frederik Gyldenløve, Count of Laurvig was a statesman and the leading Norwegian general in the Scanian War, whose Norway-related portion is conventionally named "the Gyldenløve War", after him...

 was statholder of Norway from 1664 to 1699.
In 1673 Ulrik Fredrik Gyldenløve conducted a tour of facilities, after which he recommended upgrades to both the fortresses and the military forces. During the summer of 1675, 1800 men were kept at work on the fortresses at Akershus

Akershus

- Geography :The county is conventionally divided into the traditional districts Follo and Romerike, which fill the vast part of the county, as well as the small exclave west of Oslo that consists of Asker and Bærum...

, Fredrikstad

Fredrikstad

is a city and municipality in Østfold county, Norway. The administrative centre of the municipality is the city of Fredrikstad....

, and Fredrikshald

Fredrikshald

Fredrikshald may refer to:* Fredrikshald Bay, Nunavut, Canada* Fredrikshald, Norway, former name of the town of Halden...

.

The Norwegian army in this period was much better prepared for conflict than in any of the previous Swedish wars. It numbered 12,000 men in five regiments of infantry, 6 companies of cavalry, and an artillery division with 76 field pieces. An additional Norwegian regiment was serving in Denmark.