Complex sentence: This left sector was to become the responsibility of 29th brigade and to the extreme right, 2000 yards of its line between the Imjin and Kowang-san, was handed over to 1st ROK Division.
Split into simpler sentences: This left sector was to become the responsibility of 29th brigade. To the extreme right, 2000 yards of its line between the Imjin and Kowang-san, was handed over to 1st ROK Division.