He served as captain of the Oplandske National Infantry Regiment in 1658 and captain of the Valdres company Under the command of Jørgen Bjelke he led his company in combat at Bohuslän in 1659, and in the defense of Halden from 14 January to 23 February 1660.
[2] In 1660, he was sent to Copenhagen to present plans for a new defensive work for Halden, Norway.
Together with his son Anthony Coucheron, he worked on the fortification which became known as Fredriksten fortress in Halden.
The defensive walls, built to the Dutch design of the period, were so effective a deterrent that the town, although placed under siege, was never taken.
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