when gerhard 6th was slain during a ditmarsker-raid, it even looked like margrethe might have south jutland in her power. gerhard's widow and under aged sons had to accept, that margrethe sieged one castle after the other.

How would the previous sentence be correctly capitalized?
When Gerhard 6th was slain during a Ditmarsker-raid, it even looked like Margrethe might have South Jutland in her power. Gerhard's widow and under aged sons had to accept, that Margrethe sieged one castle after the other.