Complex sentence: Nevertheless, having himself promulgated the constitution, Augusto B. Leguía almost completely ignored it and the next 10 years of his tenure were marked with a dictatorial style of ruling by suppressing all opposition harshly.
Split into simpler sentences: Nevertheless, having himself promulgated the constitution, Augusto B. Leguía almost completely ignored it. The years of his tenure were marked with a dictatorial style of ruling by suppressing all opposition harshly.