the ditch was crossed on temporarily built sturdy wooden bridges and the mounting of the turret was finished with cranes. A major part of the mounts for the turrets were completed by the end of 1905, despite the harsh winter working conditions, with temperatures falling below at times. The peak workforce amounted to around 900 men, but their numbers fluctuated, with the lowest number of active workers during the winter months. The first artillery test firing was conducted on 15 January 1907 when the guns at Gammelängsberget fired their first rounds, and all five forts "were in a defensible state" by 1908. Other fortificatory works Apart from the forts, the garrison itself was heavily expanded during the initial construction years and became the largest garrison in Sweden, taking an exceptional position in Swedish military history of the 20th century; even at the start of the 21st century, Boden was the largest garrison city in the Swedish Army. Still, no other fortifications than the forts themselves were finished by 1908, and work now started to fill the holes in between them. It was realised that prepared positions were needed for the mobile batteries, and apart from those, three larger battery positions (sometimes called fästen, strongholds) were also constructed at Leåkersberget, Norra Åberget and Svedjeberget. These works were started in 1911 and were finished during the First World War. The last of the three strongholds was positioned in the mountain itself with embrasures in the mountain side, and Leåkersberget had parts of the battery position inside the mountain, but the gun emplacements outside—the other positions were concrete fortifications above the ground, some inside a bunker and others behind a parapet. The main fortifications for infantry consisted of 44 concrete bunkers, 23 dugouts and 26 fortified observation posts. The concrete bunkers (, redoubts) were long and narrow. The longest, Abramsskansen, was long and had room for 160 men and four machine guns, but most had room for less than 80 men—usually a rifle platoon reinforced with a machine gun section and an anti-tank section. Due to their length, their curved shapes following the mountain sides, and other characteristics, the bunkers were popularly referred to as "sausages" (). The construction of these started in 1911. Many officers still considered the fortress to have inadequate and too few fortifications for the infantry, and one officer compared the fortress to "a shoe, which is too large