On this day 100 years ago, Austria-Hungary declared war on Serbia in response to the assassination of the heir to the Austro-Hungarian throne.
Read more:
100 years since World War I: build a Morse code virtual radio
On this day 100 years ago, Austria-Hungary declared war on Serbia in response to the assassination of the heir to the Austro-Hungarian throne.
Read more:
100 years since World War I: build a Morse code virtual radio