Fortification is usually divided into two branches&colon; permanent fortification and field fortification. A burh () or burg was an Old English fortification or fortified settlement. The first artillery fortification on the island was built in 1779. The Civil War era saw rapid changes in artillery and fortification. It began as a timber fortification enclosed by a palisade. The besieged Gauls simultaneously attacked the inner Roman fortification. This also helped him develop a good understanding of engineering, siege warfare, artillery, and fortification. Survivability includes the fortification of positions and the construction of new outposts. Parts of the once extensive fortification are in ruins. There are several small Scottish islands that are dominated by a castle or other fortification. So Dhaka was most likely used as the watchtower for the fortification purpose. The besieged Gauls were pulled back from the fortification. Remnants of the old town fortification wall still exist here. Meanwhile, there is no data to show adverse effects of micronutrients fortification. The tower is the third fortification on the site.