Complex sentence: He won the first battle between Tokhta Khan and him, but he didn't want to chase Tokhta, because Nogai's grandson Agtji was murdered by Genoese in Crimea while collecting tributes from them.
Split into simpler sentences: He won the first battle between Tokhta Khan and him. But He didn't want to chase Tokhta, because Nogai's grandson Agtji was murdered by Genoese in Crimea while collecting tributes from them.