Artists impression of the Prior line.
A 254mm coastal gun firing during practice in late february 1939
In march 1939 Hitler moved again, now trying to gobble up the rest of Czechoslovakkia. He didn't consider the Czechoslovakkian will to fight however and thus, when the german troops tried to move into the country on march 15th they encountered stiff resistance. War was declared on the same day and for the first time again since 1922, there was an armed conflict in europe.
Situation in southern scandinavia on march 15th 1939
Mobilization was immediately ordered. The German border was protected by mere four divisions. Over 30 divisions were formed from the mobilized men and more were being trained to be operational in the coming months. Of those 30 divisions 23 were placed on the german border, the rest were used to fortify the very long and exposed SCU coastline.
The expected war failed to materialize however. The german troops swept the Czechoslovakkian defenders from their now exposed positions and declared the country annexed on April 6th. The only action the British and French managed was the inclusion of Poland, a most likely target for the next Nazi agression, into the alliance. While severly dissapointed and alarmed by the actions of Hitler the French and British goverments did little to save the czechs and slovaks. The price of "peace in our time" was steep and paid in blood.
The defence budget was further increased with conflict in the air and Nazi rethoric versus Poland increasing. In late april Saab industries put a new fighter aircraft J21B into production
The new fighter was a lot faster although a bit less maneuverable than the old J20A. Armed with two 12.7mm and two 7.62mm machineguns it also boasted an increased firepower. With a top speed over 35km/h greater than the German Bf109C the new fighter was more than a match for the ever increasing Luftwaffe.
The SCUAF naval and bomber commands were also increased. Two additional naval bomber squadrons were ordered to be formed. Armed with the venerable T1 bomber based on Heinkel HD16 torpedo bomber the naval squadrons were somewhat vunerable but still a strong striking force.
T1 torpedo bomber, the mainstay of SCUAF naval command
It was realised that the old bombers needed escort to protect them from the fast modern fighters. Thus, in cooperation with the British Westland aviation company, the J22E was produced.The airplane was based on the rejected (due to engine trouble) Westland Whirlwind design. Powered by the now perfected Rolls Royce engines and armed with four 20mm cannons she was the fastest and most heavily armed fighter in Europe. The design did lack maneuvering qualities however so skillful piloting was required to make her successful in combat with more nimble fighters.
The new J22A, here in RAF colors
On August 24th the world was shocked to hear of a non-agression pact signed between Germany and Soviet Union. To SCU it meant that two of its main enemies had signed an informal alliance and the goverment realised that war was imminent. Soon the diplomatic circles were buzzing with leaked news of "secret clauses" in the treaty, dividing eastern europe into zones of influence. Territories of estonia and finland were under Soviet influence according to informators in Berlin and Moscow.
Quietly the fleet left the port for "maneuvers" and took up position north of Gotland. All ground forces were put to high alert and the fighter squardons started flying heavy combat air patrols over strategically important installations in southern scandinavia. Bridges and viaducts were prepared for demolition in southern Jutland.
The predictions proved true. On the morning of september the 1st, 1939, the German troops invaded Poland. Using a small border incident as an excuse, Hitler argued that Poland had invaded Germany and as such no war declaration was necessary. SCU, UK and France issued an ultimatum demanding the withdrawal of German forces from Poland. The Ultimatum expired by 3PM. Europe was now at war!