Complex sentence: He was victorious at Brăila, Tighina and Cetatea Alba, but when an army of 150.000 turks was sent against him, he surrendered himself hoping that his moldavian and cossack soldiers would be spared.
Split into simpler sentences: He was victorious at Brăila, Tighina and Cetatea Alba. When an army of 150,000 Turks was sent against him, he personally surrendered, hoping that his Moldavian and Cossack soldiers would be spared.