Complex sentence: Shortly after the Hollandia landing, the division's 34th Infantry Regiment moved to Biak on June 18, to reinforce the 41st Infantry Division, and captured Sorido and Borokoe airdromes before returning to the division on Hollandia in July.
Split into simpler sentences: Shortly after the Hollandia landing, the division's 34th Infantry Regiment moved to Biak to reinforce the 41st Infantry Division. The regiment captured Sorido and Borokoe airdromes before returning to the division on Hollandia in July.