Caesar Zeppeli

Battle Tendency
Cover of JoJo's Bizarre Adventure volume 8, featuring the Pillar Men, with Joseph Joestar in the foreground
戦闘潮流 (Sentō Chōryū)
Manga
Written by	Hirohiko Araki
Published by	Shueisha
English publisher	NA Viz Media
Demographic	Shōnen
Imprint	Jump Comics
Magazine	Weekly Shōnen Jump
Original run	1987 – 1989
Volumes	7 (List of volumes)

Battle Tendency (Japanese: 戦闘潮流, Hepburn: Sentō Chōryū) is the second story arc of the manga series JoJo's Bizarre Adventure written and illustrated by Hirohiko Araki. It was serialized in Weekly Shōnen Jump from 1987 to 1989 for 69 chapters, which were later collected into seven tankōbon volumes. The arc was preceded by Phantom Blood (1987) and followed by Stardust Crusaders (1989–1992).

In 2012, Battle Tendency was digitally colored and released as digital downloads for smartphones and tablet computers. A four-volume hardcover re-release under the title JoJonium (ジョジョニウム, Jojoniumu) was published between February 4 and May 2, 2014. This version was licensed and released in North America by Viz Media; beginning digitally in March 2015 and in print in November 2015.

In its original publication, it was referred to as JoJo's Bizarre Adventure Part 2 Joseph Joestar: His Proud Lineage (ジョジョの奇妙な冒険 第二部 ジョセフ・ジョースター ―その誇り高き血統, JoJo no Kimyō na Bōken Dai Ni Bu Josefu Jōsutā Sono Hokoritakaki Kettō). Battle Tendency was adapted in the 2012 anime television adaptation by David Production between December 7, 2012 and April 5, 2013.

In 1938, Joseph Joestar, grandson of Jonathan Joestar, discovers his "uncle" Robert E. O. Speedwagon is being held captive in Mexico by a group of Nazi scientists under the command of Major Rudol von Stroheim in a facility studying the vampire-creating Stone Masks and a being known as a "Pillar Man" who is believed to be the Stone Mask's creator. After saving everyone from the awoken Pillar Man Santana with his wits and latent abilities to use the martial art known as the Hamon, Joseph is warned by Stroheim that his people have discovered three other Pillar Men in Italy. He teams up with fellow Hamon user Caesar Zeppeli, the grandson of Jonathan's ally Will A. Zeppeli, yet fails to prevent the resurrection of the Pillar Men Wamuu, Esidisi, and Kars. Joseph manages to convince the Pillar Men to allow him to master Hamon to become a worthy opponent, having poison-filled rings implanted in him with a challenge to defeat them within a month to receive the obtains the antidote. Caesar takes Joseph to meet his teacher, the mysterious lady Lisa Lisa who is the last master of the Hamon on Earth and as such protects a gemstone called the Red Stone of Aja (エイジャの赤石, Eija no Sekiseki) from falling into the hands of the Pillar Men, as they need the gem to become perfectly immortal.