Theodoric and his brother Frederick armed civilians and peasants and with some assistance from knights from Brunswick they defeated Albert in the Battle of Lucka on 31 May 1307 .
In 1307 , King Albert I of Germany invaded the Osterland with a large army .
Theodoric and his brother Frederick armed civilians and peasants and with some assistance from knights from Brunswick they defeated King in the Battle of Lucka on 31 May 1307 .
In 1307 , King Albert I of Germany invaded the Osterland with a large army .