Complex sentence: Eventually, Anchieta succeeded in celebrating a peace treaty, which was respected by Cunhambebe and the Tupinambás until the attack force led by Portuguese knight D. Estácio de Sá (1520--1567) tried to expel the French invaders.
Split into simpler sentences: Eventually, Anchieta succeeded in negotiating a peace treaty, which was respected by Cunhambebe and the Tupinambás. The peace treaty ended when an attack force led by Portuguese knight D. Estácio de Sá (1520--1567) tried to expel the French invaders.