The new fighting, over a hilltop, followed a four-day lull after more than 110 people were killed in a week.
The fighting follows several recent attempts to reassert control over the city through peaceful means.
Further fighting followed the proclamation, which did not have a conclusive end, although peace was declared in December 1882.
The fighting followed clashes on Thursday in the region's capital.
Serious fighting followed, continuing for weeks until a cease-fire was declared on February 19, 1988.
A lot more fighting followed, and for many years Bohemia was ruled by kings who lived in other countries.
During the day, fierce fighting followed in different areas of the city between the insurgents and German soldiers.
Much desperate fighting followed but the Americans had come to stay.
Bloody hand-to-hand fighting followed, and all of the defenders were killed.
The fighting follows a week of military buildup on both sides.