After World War I ended in 1918, the coastal artillery corps that was planned was never raised, and the newly built barracks in Härnösand was instead handed over to the health service.

At the outbreak of World War II in 1939, 125 conscripts were transferred from Vaxholm Coastal Artillery Regiment.

Two years later, another 400 conscripts and about 10 officers from Karlskrona Coastal Artillery Regiment (KA 2) were stationed on Hemsön.

The only military presence left on Härnön is located to the chancellery and the northern part of the barracks area.

On 19 June 1945, the double swallow-tailed Swedish flag was hoisted for the first time at the top of the new chancellery in Härnösand.

The colour is drawn by Brita Grep and embroidered by hand in insertion technique probably by the company Libraria.

[8] Blazon: "On red cloth in the centre the badge of the former Coastal Artillery; two gunbarrels of older pattern in saltire under a royal crown proper and over a blazing grenade and waves, all yellow.