That IS sengoku Jidai. The brazilian old republic was like Warlord era China or feudal japan. The oligarchs that took power in the 1889 coup devolved the country into a almost feudal situation, so much that they had their own militia (jagunços), we had bandits raiding cities like Lampião (Lampião raided, raped and looted cities in eight states), we had governors ruling without elections for decades and decades like Borges de Medeiros, we had states falling into civil war like the Rio Grandense civil war. When the 1930 revolution happened the situation was close to the Meiji restoration, because the combined civilians, low ranking officers, thinkers and innovative politicians from other states marched and took the capital and created a federal government.