Complex sentence: The NDL had a fleet at the start of the war with a total tonnage of more than 700 GRT, the Treaty of Versailles had the delivery of all sea-going vessels over 1,600 GRT and half of all units from 100 to 1,600 GRT.
Split into simpler sentences: The NDL had a fleet at the start of the war with a total tonnage of more than 700 GRT. The Treaty of Versailles had the delivery of all sea-going vessels over 1,600 GRT and half of all units from 100 to 1,600 GRT.