His efforts failed , however , and he was forced to submit to the Livonian branch of the Teutonic Knights .
Suerbeer was an aggressive supporter of papal power and tried to take over the whole eastern Baltic area for the Holy See .
Suerbeer 's efforts failed , however , and he was forced to submit to the Livonian branch of the Teutonic Knights .
Suerbeer was an aggressive supporter of papal power and tried to take over the whole eastern Baltic area for the Holy See .