In order to gain its Independence Belgium had to promise to stay neutral in the world economy and in wars, this was decided by the Grand Alliance in 1831, but after WW1 a lot had happened and they couldn't stay neutral anymore.
The country had to stay independent, but its people fought back against the oppressor, like the resistance.
Belgium .
Because Belgium was the country in which the Nazis had to march through in order to get to France another way. The Belgians resisted the German army in every way they could, but it caused them to get involved in the war.
Germany's brutal invasion of neutral Belgium
Great Britain declared war on Germany.
Belgium and the tiny micronation of Luxemburg, then France. It was the German invasion of Belgium which caused the United Kingdom to declare war on Germany in 1914.
Germany's brutal invasion of neutral Belgium
The 1939 invasion of Poland caused Britain to declare war on Germany, which started WWII.
Poland
Belgium had been a major battlefield in WW 1 with all the devastation, loss of life and displacement of tens of thousands of Belgians that came with it. Belgium had every reason to fear that an eventual continuation of that war would again put them in the heart of the tornado, so to speak - as it did, a few years later. It hoped to avert that fate by declaring itself neutral at an early stage. Excellent response! By the year 1936, 3 years before the outbreak of WW2, Belgium recognized that the German military build up was a danger to them. Since 1930, under the Wiemar Republic, Germany had begun to re- arm itself. Under the control of Hitler, this build up continued. Thus Belgium being aware of this declared in 1936, its neutrality.
A pandemic is caused when a virus spreads from country to country without being able to be contained. When there is no way of stopping the spread of the virus and the amount of people getting the virus go up by the thousands a day, the WHO will declare a pandemic.
Pearl Harbor.
Germany declared war on France and invaded Belgium. This caused the United Kingdom to declare war on Germany.The time lines of WW1 and 2 can be found in the related links below.