A longtime saying in war is that artillery is the king of the battlefield.
But some artillery are better than others, but the best are those that can drive themselves to battle.
An ARCHER Artillery System. (Wikimedia Commons)
For a long time, all artillery was towed. First the towing as done by horses, then by trucks or other vehicles. But there was a problem. The artillery took a while to set up, then, when the battery had to move — either because troops advanced or retreated – or the enemy found out where the artillery was located, it took time to do that.
Fighter pilots say, speed is life." Artillerymen would not disagree. Towed artillery had another minus: It had a hard time keeping up with tanks and other armored fighting vehicles.
Night falls at Fort Riley, Kan., as an M109A6 Paladin self-propelled howitzer with 1st Battalion, 7th Field Artillery, fires a 155 mm shell during 2nd Armored Brigade Combat Team, 1st Infantry Division's combined arms live-fire exercise Oct. 30, 2014. (U.S. Army photo by Sgt. John Portela/released)
The way to cut the time down was to find a way a howitzer could propel itself. The advantage was that these guns not only could support tanks and other armored units, but these guns often had an easier time setting up to fire. They could also be ready to move much faster, as well.
This ability to "shoot and scoot" made them much harder to locate.
2S19 Msta self-propelled howitzer. (Wikimedia Commons)
Most self-propelled howitzers fire either a 152mm round (usually from Russia and China, but also from former communist countries like Serbia) or a 155mm round (NATO and most other countries). Often these guns are tracked, but some have been mounted on truck chassis, gaining a higher top speed as a result.
A PzH 2000 self-propelled howitzer belonging to the Dutch Army fires on the Taliban in 2007. (Wikimedia Commons)
Some of the world's best self-propelled howitzers include the American-designed M109A6 Paladin, the Russian 2S19, the South Korean K9 Thunder, and the German PzH-2000.
You can see the full list of the ten deadliest self-propelled howitzers in the video below.