During the early 1900s, the european nation whose increase in military forces and equipment alarmed other european nations was russia. italy. france. germany.

The correct answer is Germany. European countries slowly became aware that a war was inevitable and Germany was preparing for it with everything that she had. They were together with Austria-Hungary empire when the war started and eventually lost the war, being forced to completely stop production of weaponry and turn in all the weapons that it had, effectively disbanding the military.