The Kfir (lion cub) is an Israeli development based on the Mirage 5, and can trace it roots back to the Mirage IIIC adapted for Israeli use successfully as a Mach 2 all-weather interceptor with success, but they felt it lacked the loiter time that would be needed if a ground-attack role was to be added its task list. As a result of an arms embargo, Israel built the Nesher, which was then improved further and was suitably different to be renamed as the Kfir. It entered service in 1975, and was almost immediately superseded in the air superiority role when the first F-15s arrived from America.
The successful French Fouga CM.170 Magister lightweight jet trainer found its origins in a powered glider design of all-metal construction called the C.M.8.15 which sported a butterfly style tail empennage and was designed by P.Mauboussin and J.Szydlowski. The final stage of development of the C.M.8.15 glider led to the CM.170 Magister which was designed to meet an Armée de l´Air specification and like the powered gliders which preceded it this also sported a distinctive butterfly-type empennage. Within Europe the Magister was flown by France, Belgium,Germany, Austria and Ireland but there were also many other operators worldwide in Africa, Asia and South America, many of whom were no doubt attracted by its lightweight design and low operating costs.
The Biber (German for “beaver”) was a German midget submarine of the Second World War. Armed with two externally mounted 21-inch (53 cm) torpedoes or mines, they were intended to attack coastal shipping. They were the smallest submarines in the Kriegsmarine. The Biber was hastily developed to help meet the threat of an Allied invasion of Europe. This resulted in basic technical flaws that, combined with the inadequate training of their operators, meant they never posed a real threat to Allied shipping, despite 324 submarines being delivered. One of the class’s few successes was the sinking of the cargo ship Alan A. Dale. A number have survived in museums, including one example that has been restored to operational condition. [Wiki]