Siege of Gana

In the winter of 928, King Henry the Fowler of Germany launched a military expedition along his eastern frontier against a series of Slavic fortifications. His first objective was the princely seat of the Hevelli tribe at Brandenburg, situated on the Havel River. After weakening Hevelli military power through multiple engagements, the Germans stormed the Brandenburg fortress and occupied it. Upon occupation of the fort, Henry proceeded to take over all of Hevelli territory. With its capture, Henry extended control over all Hevelli territory. The next German campaign target was the Glomacze fortress of Gana near the Jahna river. The next target was the Glomacze stronghold of Gana near the Jahna River. En route, Henry's forces advanced through the Plane valley and into the Fläming hills, seizing additional Slavic forts at Belzig, Mörz, Niemegk, and Zahna. To consolidate these gains, German forts were established in 929 at Strehla—commanding a key ford across the Elbe—as well as at Osterburg and Dahlen, securing the newly conquered region. ==Siege==

Archaeological excavations in the 1990s and again in 2003 uncovered a fortress in the Jahna River valley near Hof/Stauchitz that may be identified with the Gana site. The fort's walls measured 15 meters thick at the foundation and rose to a height of 6 meters. It was surrounded by a ditch 15 meters wide and 5 meters deep. The circuit of the walls extended 700 meters, enclosing an area of 4 hectares, not including a possible outer fort. To storm the stronghold, Henry's men had to fill in a 200‑meter section of the ditch. This required excavating some 15,000 tons of earth, a task demanding at least 50,000 man‑hours. The soil then had to be transported and dumped into the ditch using wagons. Estimates suggest 750 carts and 30,000 wagon‑loads of earth were needed, requiring an additional 60,000 man‑hours of loading, transport, and unloading. With only eight hours of daylight in winter, 1,000 men would have needed two weeks to complete the operation. When Gana finally fell at the end of the 20‑day siege, Henry ordered the defenders killed and the young boys and girls enslaved by his professional soldiers (milites). The ferocity of the conquest suggests the Germans suffered heavy losses. Bachrach estimates more than 1,000 killed or wounded, based on a mathematical siege model applied to the Brandenburg fortification. ==Aftermath==

After the conquest of Gana, Henry advanced up the Elbe to pursue his ultimate objective: the siege of Prague and the subjugation of Duke Wenceslaus I's Duchy of Bohemia. Along the way, he ordered the construction of a fortress at Meissen. Dendrochronological analysis of its wooden structures confirms an early building stage in 929. Meissen secured German control over the middle Elbe and was soon followed by the creation of the Marca Geronis to administer and defend the new frontier. With reinforcements from Duke Arnulf of Bavaria, Henry invaded Bohemia with a force of 12,000–15,000 men, combining professional soldiers with militia levies. The campaign culminated in the surrender of heavily fortified Prague, marking a decisive success and establishing German dominance in the region. Analysis The scale and success of the German siege operations in 928–929 demonstrate that Henry and the German kingdom possessed the capacity to mobilize thousands of soldiers and sustain them over extended campaigns. Supplying these forces required not only manpower but also transport animals, food, and fodder, indicating a sophisticated logistical network. Such organization reflects the growing ability of the early German monarchy to coordinate resources across its realm, a capability that distinguished it from many contemporary polities and enabled the conquest and permanent control of new territories. ==Citations==