Complex sentence: He had spent his private fortune in the prosecution of his public policy; the company refused to acknowledge the obligation; and the government would do nothing for a man whom they persisted in regarding as an ambitious and greedy adventurer.
Split into simpler sentences: He had spent his private fortune in the prosecution of his public policy. The company refused to acknowledge the obligation, and the government would do nothing for a man whom they persisted in regarding as an ambitious and greedy adventurer.