Complex sentence: He went to england to enlist in the army and fight in WWI and then moved to South Africa were he established a Ranch with his brother in law to finally move back to Buenos Aires in his home country were he lived his last years.
Split into simpler sentences: He went to England to enlist in the army and fight in WWI and then moved to South Africa where he established a ranch with his brother-in-law. Finally, he moved back to Buenos Aires in his home country were he lived his last years.