Bayonet: In the early 17th century, sportsmen in France and Spain adopted the practice of attaching knives to their muskets when hunting dangerous game, such as wild boar.

Barbed Wire: Invented in the late 19th century as a means to contain cattle in the American West, barbed wire soon found military applications

Steamship: “The employment of steam as a motive power in the warlike navies of all maritime nations, is a vast and sudden change in the means of engaging in action on the seas, which must produce an entire revolution in naval warfare,” wrote British Gen. Sir Howard Douglas 1858

The Telegraph: it transformed the relationship between the executive branch and the military. Before, important battlefield decisions were left to the discretion of field generals. Now, however, the president could fully exercise his prerogative as commander in chief.

The #Bitcoin : initially seen an as exchange of value between peers on the internet without intermediaries, various properties in its engineering made it became the backbone security network for the decentralised web. Protecting users against Hacks and Cyber warfare (SoftWar)