Complex sentence: Working with General Victoriano Lorenzo and others, he began his struggle from the Costa Rica in the West, organized a volunteer army and swept through until reaching the capital where he was defeated in the Battle of Calidonia Bridge.
Split into simpler sentences: Working with General Victoriano Lorenzo and others, he began his struggle from Costa Rica in the West. He organized a volunteer army and reached the capital where he was defeated in the Battle of Calidonia Bridge.