 Complete the following phrase:  In the 1230s, there were military clashes between the Christians and the Lithuanians near the northern borders of what was then part of Livonia. The Livonian Brothers of the Sword, founded in 1202, began campaigns to expand into the area. Through the Livonian Crusade, they conquered the Terra Mariana that bordered Lithuanian Samogitia, which increased conflicts. Those conflicts reached their apex in 1236 with the 