Loznica is a city located in the Mačva District of the western Serbia. It lies on the right bank of the Drina river. Its name stems from the word "loza" (the Serbian word for vine). Originally, its name was Lozica (Serbian for small vine), but it later became Loznica.

Loznica has a humid subtropical climate with cold winters, often very cold due to the mountain winds of nearby mountains, and warm to hot summers. When hot air from Adriatic Sea starts going inland, to the north-east it rises over mountain barriers (Zlatar and Zlatibor), gaining jet effect and continuing fast to western parts of Serbia.

Among cultural heritage include the Church of the Holy Virgin located in the town, the 14th-century Čokešina Monastery, the 13th-century Tronoša Monastery, and monuments on Mount Gučevo, in Tekeriš, and in Draginac, as well as the ethnic village of Tršić.

A Serbian epic poem is the Battle of Loznica in which the central figure Anta Bogičević leads Serbian forces during the First Serbian Uprising. The most important local cultural event is "Vukov Sabor" (Council of Vuk) in Tršić, held annually in September, in memory of Vuk Stefanović Karadžić who was born in the village; it remains the oldest and largest cultural event in Serbia, for its importance and the increasing volume (20-30,000 visitors).

Šabac is a city and the administrative center of the Mačva District in western Serbia. It is situated along the Sava river, near the mountain Cer, in the region of Mačva.

The etymology of name Šabac is uncertain, although its resemblance to the name of the Sava River is suggestive. This name is in use since the end of the 15th century. In Serbian, the town is known as Šabac, in Turkish as Böğürdelen, in German as Schabatz, and in Hungarian as Szabács.

Prior to 1990, Šabac had one of the best developed economies in Yugoslavia. The main industries of Šabac today are agriculture, transportation and food production. Since 2000, some of the more important companies are diary plant Mlekara Šabac, Elixir Group, Zorka Pharma, and Hesteel Serbia Iron & Steel - Tin mill.