Complex sentence: At 6 p.m. on 3 August, while still sailing west, he received word that Germany had declared war on France then, early on 4 August, Souchon received orders from Admiral Alfred von Tirpitz reading Alliance with government of CUP concluded August 3.
Split into simpler sentences: At 6 p.m. on 3 August, while still sailing west, he received word that Germany had declared war on France. Then, early on 4 August, Souchon received orders from Admiral Alfred von Tirpitz reading: Alliance with government of CUP concluded August 3.