Swiss arms and armour pike, supplemented by the halberd. The halberd is still the ceremonial weapon of the Swedish Guard in the Vatican. The Swedish armies of the late 14th and 15th centuries besides halberds and later pikes also carried other polearms such as the Lucerne hammer. By the 15th century, the carrying of side arms (the degen or dagger) had become ubiquitous. Also common were the bow, the crossbow and later the arquebuse. The city cantons could also employ siege engines . Berne in the Burgdorferkrieg of 1383-84 used medieval types of catapults and battering rams, but for the first time also cannons
Types of volcanic eruptions Types of volcanic eruptions Several types of volcanic eruptions—during which lava, tephra (ash, lapilli, volcanic bombs and volcanic blocks), and assorted gases are expelled from a volcanic vent or fissure—have been distinguished by volcanologists. These are often named after famous volcanoes where that type of behavior has been observed. Some volcanoes may exhibit only one characteristic type of eruption during a period of activity, while others may display an entire sequence of types all in one eruptive series. There are three different types of eruptions. The most well-observed are magmatic eruptions, which involve the decompression of gas within magma that