Fall of Luxembourg.
Belgium and the Netherlands responded immediately to the Luxembourgian cry for help. The Belgian army mobilized a division, some fifty thousand men, and sent them on a forced march to join up with the bulk of the Luxembourgian armed forces which were holding out stubbornly in the capital city of Luxembourg city against a much larger German force equipped with tanks and aircraft. Of which neither Belgium or Luxembourg held any large amount of, forcing the Netherlands to send a portion of their armored and airborne forces to assist. Thus thirty tanks, the same number of armored cars, twenty five hundred elite troops and three squadrons of aircraft were detached from the main army to assist.
The aircraft arrived first on the fourteenth of April and immediately engaged the Luftwaffe planes bombarding the city. Their arrival caught the Germans by surprise, no one considered the possibility of the Netherlands sending aircraft, or any forces what soever to assist Luxembourg. The Dutch pilots managed to destroy eight Stuka dive bombers on the first day. The next day the Germans diverted BF109 fighters from the fighting in France to escort the bombers, leading to the first great air battles of the war. Dutch and German planes were found to be roughly similar, much the same could be said of both German and Dutch aces. Which both flew their planes very aggressively and effectively. It was the first time the German pilots had ever faced modern aircraft and it showed. Four BF109 were lost on the 15th, with a total of ninety three lost during the course of the low countries invasion.
Both Belgian and Dutch ground forces arrived in Luxembourg on the sixteenth and immediately charged the German lines. The attack was poorly planned, especially on the Belgian side, and was repulsed with heavy losses by a well planned German counter attack. The Luxembourgian army abandoned Luxembourg city not long after and along with the rest of the combined army began a fighting retreat out of the country. The Wehrmacht would occupy all of Luxembourg by the twentieth. Just eight days after the initial invasion. In total losses on the German side amounted to just under ten thousand, five tanks and twenty six aircraft. Allied losses amounted to around fifteen thousand, two tanks and fifteen aircraft.
The Luxembourgian government and royal family left the country on the 19th of April bound for the safety of the Netherlands. The Germans hastily rounded up a retired prime minister, held a phony election and re-instated him as PM. And then had him surrender Luxembourg unconditionally to Germany. Hitler then announced plans to add the country to the Reich, the first step in uniting all Aryans under one flag. Luxembourg would then be required to provide men for the war effort. Eventually thirty thousand men between the ages of eighteen to thirty five would serve in the Wehrmacht, often on the eastern front. And often against their will.
Battle of Belgium
The allies had little time to prepare for the German invasion of Belgium. After a brief two day break to gather up their forces the Germans launched their invasion into Belgium. The large Belgian army and extensive fortifications designed to repulse any invasion proved ill equipped to handle attack from mobile armored units and air attack. Within days the Germans had taken Liege and most of Namur. From the 25-29th the Belgians managed to halt the German advance, but all involved knew it would only be temporary.
On the 29th however the Germans powered through the Belgian lines and used sheer momentum to carry them through to the capital of Brussels. The government and royal family evacuated the country on the 1st of May. By which time ten thousand French troops arrived into the country and joined the allied troops in defending the Belgian capital city of Brussels from the Germans for the five day siege. On the sixth the allies abandoned the city, along with the provinces of Brabant and Hainaut, leaving only Ost and west Flanders out of German hands. The Germans would manage to take even these heavily defended provinces by the tenth.
Thousands of Belgian troops and civilians poured into neighboring France and the Netherlands. The fifteen thousand men who fled into France would form a special unit in the French army, fighting hard around Paris before the surrender. Those that escaped to the Netherlands aided in the defense of that country, serving well against increasingly stiff German attacks. Back in their homeland the Germans accepted the surrender of Belgium by remnants of the government on the twelfth of May. Belgium would be forced to cede the provinces of Liege and Namur to Germany, and join the Axis. Belgium declared war upon France, Britain and the Netherlands on the fifteenth. Sending a total of two hundred thousand of its men to fight in German armies in every theater of the war. Often Belgian units recieved the most dangerous assignments, and suffered extremely high casualty rates as a result.