Complex sentence: Roy and his gunner Fritz Eckstein were credited with destroying eight tanks on 8 August and the next day knocked out a further 13 tanks, and within five days had knocked out a total of 26 tanks, which brought his total up to 36 tanks destroyed.
Split into simpler sentences: Roy and his gunner, Fritz Eckstein, were credited with destroying eight tanks on 8 August and the next day knocked out a further 13 tanks. Within five days, the duo had knocked out a total of 26 tanks, which brought his total up to 36 tanks destroyed.