Short answers, pulled from the story.
Militarism is defined as a core political stance rather than just a defense strategy. It involves the belief that a state should maintain strong military capabilities and use those forces aggressively to expand national interests.
Frederick William I started large-scale military reforms in 1713. He increased annual military spending to 73% of the entire budget of Prussia during his reign.
German militarism continued from 1918 until 1933 despite Allied attempts to crush it through the Treaty of Versailles. The period included events like the 1920 Kapp Putsch and the operation of right-wing paramilitary organizations such as Der Stahlhelm.
The February 26 Incident resulted from gekokujō or institutionalized disobedience by junior officers who assassinated their seniors. Radical junior officers attempted a coup d'état before Emperor Hirohito ordered suppression.
By the end of 2023 Vladimir Putin planned to spend almost 40% of public expenditures on defense and security. UK Chief of Defence Staff Admiral Tony Radakin noted that such levels had not been seen since the collapse of the Soviet Union.