Halberd better repel knightly attacks and roll over enemy infantry formations, with the halberd, hand-and-a-half sword, or the dagger known as the "Schweizerdolch" used for closer combat. The German "Landsknechte", who imitated Swiss warfare methods, also used the pike, supplemented by the halberd—but their side arm of choice was a short sword called the "Katzbalger". As long as pikemen fought other pikemen, the halberd remained a useful supplemental weapon for "push of pike", but when their position became more defensive, to protect the slow-loading arquebusiers and matchlock musketeers from sudden attacks by cavalry, the percentage of halberdiers in the pike units
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