Complex sentence: During the early hours of 2 August "Nagato" was ordered to put to sea to intercept an Allied force, but this sortie was canceled before she had completed preparations to leave port as the report of Allied ships was determined to be false.
Split into simpler sentences: During the early hours of 2 August "Nagato" was ordered to put to sea to intercept an Allied force. However, this sortie was canceled before she had completed preparations to leave port as the report of Allied ships was determined to be false.