Original sentence: LST-469 had been carrying troops and supplies for Operation Chronicle, an amphibious landing at Woodlark and Kiriwina islands on 30 June, and this operation was disrupted by her not being available
Edited sentence: LST-469 had been carrying troops and supplies for Operation Chronicle, an amphibious landing at Woodlark and Kiriwina islands on 30 June, and this operation was hindered by her not being available