other (multiple High Explosive loads in one stick grenade). Another such German attempt at man-portable AT weapons was the "Hafthohlladung" (attachable shaped charge). It was a large shaped charge equipped with three magnets so it would stick to a tank, but it was too heavy to be thrown: it had to be stuck to the target area of a tank directly. After the end of World War Two, many eastern European nations engineered their own versions of the RPG-6, such as the Hungarian AZ-58-K-100. These were manufactured in the tens of thousands and given to 'armies of national liberation', seeing combat worldwide, including with the Egyptian Army during 1967 and 1973. The first Japanese anti-tank grenade was a hand-thrown grenade, which had a simple 100 mm diameter cone HEAT warhead with a simple "all the way" fuse system in the base. (If dropped accidentally with the pin removed, it would explode). It had what looked like the end of a mop head on the tail end of the warhead. A soldier would remove the antitank grenade from its sack, pull the pin, and throw it gripping the mop-head as the handle. This was dangerous, as there was no arming safety after release and the thrower could strike something in his back swing before release. Penetration was reportedly only around 50 mm. The second Japanese anti-tank grenade, a suicide weapon, was nicknamed the "lunge mine". This weapon was a very large HEAT warhead on a five-foot stick. The soldier rammed it forward into the tank or other target, which broke a shear wire that allowed a strike pin to impact a primer and detonate the large HEAT warhead—destroying both soldier and target. While crude, the Japanese lunge mine had six inches (150 mm) of penetration, the greatest penetration of any anti-tank grenades of World War Two. The U.S. Army first encountered the hand-thrown anti-tank grenade in 1944, in the Philippines (some believe they were locally manufactured). The later suicide lunge mine first appeared during the U.S. invasion of Saipan and the subsequent invasion of Okinawa. Tens of thousands of these crude devices were produced and issued to both regular units and home-guard units on the home islands of Japan before the war ended. In the late 1970s, the U.S. Army was worried about the lack of emergency anti-tank weapons for issue to its rear area units, to counter isolated enemy armored