Time to Part Ways
Time spent learning was always happy and brief.
Aside from those fortunate children who had been sick of nine years of compulsory education, most people in this world actually had no access to basic education.
Of the world's 7.2 billion people, the West combined had roughly 1.2 billion, while the East combined had around 1.6 billion. Together, they did not even make up half of the 7.2 billion. The remaining two-thirds lived amid famine, war, and poverty. Only a small number of people in their countries could enjoy the basic education that the Eastern and Western worlds took for granted.
That small minority was practically negligible compared to their total populations.
That was precisely why the chance to learn was so rare and precious to many people—just like peace.
So when Leo was willing to teach, they were naturally willing to learn. Everyone seriously studied Leo's ideas and tactics.
Especially Haki.
Leo had awakened Observation Haki during his previous battle with the Spade Pirates, and he had already begun to use it with ease. Naturally, teaching it to them became much simpler.
As for Armament Haki, it required years upon years of tempering the body. Otherwise, it could easily damage the body instead.
So Leo was in no hurry to have them train Armament Haki.
It was actually somewhat regrettable. If they were a little stronger, and someone knew Rokushiki, getting started with Armament Haki would have been much easier.
In fact, the shadow of Haki training could be seen almost entirely within Rokushiki.
Iron Body and Paper Art were probably the foundations of the foundations, things that had to be learned. Iron Body corresponded to Armament Haki, while the advanced form of Paper Art was Observation Haki.
The other four techniques were mostly advanced applications