Battle of Badajoz
1936 CE.
Shown on the map at 38.867°, -6.967°.
The Battle of Badajoz was one of the first major engagements of the Spanish Civil War, resulting in a tactical and strategic Nationalist victory, however at a significant cost in time and troops. After several days of shelling and bombardment, Nationalists stormed the fortified border city of Badajoz on August 14, 1936, cutting off the Spanish Republic from neighbouring Portugal and linking the northern and southern zones of Nationalist control (although actual contact with General Emilio Mola's northern troops was not established until September 8).
Text from the Wikipedia article Battle of Badajoz (1936), licensed CC BY-SA 4.0.