Charles's army sets up siege lines to…

Charles's army sets up siege lines to the North and West of the city; the South and East are guarded by the rivers Krur and Rhine, respectively.

Two large islands lie in the Rhine, however, and Charles decides to capture them, reasoning that he will then control passage along the Rhine (and thus prevent the city from being resupplied) and the water supply to the city's moat.

Several assaults in early and mid-August eventually capture the islands, though with heavy losses; soon thereafter a bridge to one of the islands collapses, drowning many of Charles's Italian soldiers.

The Burgundians are also harried by hostile peasants.