He was a formidable martial artist, having trained his daughter, Bane, Bruce Wayne and many others in the ancient art of Ninjutsu.
Although most fans know of Batman being trained by Ra's al Ghul, there are plenty of other notable people who have shown the Caped Crusader how to beat criminals to a pulp. Bruce Wayne had to train his body to a high level, in order to keep pace with the baddies of Gotham, and all of DC.
Sensei. The father of Ra's al Ghul, Sensei is considered a a highly skilled martial artist having trained a great number of the League of Assassins.
After being forced to accept Ra's al Ghul's offer for him to become the Heir to the Demon, the Assassins began grooming him to take over their master's position. As an Assassin, Oliver received an all-new look and was personally trained by Ra's al Ghul himself. Through him, Oliver became an even better warrior.
Beginning in Batman Annual #26 ("Head of the Demon"), Talia takes Damian to the Australian Outback, where he is tutored in the secret history of his grandfather Ra's al Ghul. Talia is unaware that White Ghost, a former servant of Ra's, plans to use him to resurrect Ra's, which would kill him in the process.
Jarro became the new Robin and was even said to be Batman's favorite Robin, admitted by Batman himself.
First Appearance: Detective Comics #38, "Robin, the Boy Wonder" (1940) By Bill Finger, Jerry Robinson, & Bob Kane. First introduced in the 1940s, Dick Grayson was Batman's first Robin and remains a close equal to the Caped Crusader.
Bruce famously trains with the League of Assassins (or Shadows, as they're called there) in Christopher Nolan's Dark Knight trilogy, but that's never been part of his education in the comics.
Talia saved Oliver from captivity and afterwards offered to train him and help him take down the corrupt official Konstantin Kovar.
After Ra's death, Malcolm Merlyn succeeded him as the new leader of the League of Assassins, the next "Ra's al Ghul", however, Oliver Queen was chosen to be the true Ra's al Ghul and leader of the League of Assassins; as he not only survived Ra's blade in a death match, but he also killed Ra's.
After Nyssa's apparent death at the hands of Cassandra Cain, Talia became the sole Demon's Head. However, the League of Assassins had apparently splintered and Cassandra Cain had gained partial control.
Black Canary has actually fought Ra's al Ghul several times over the years and has always been able to beat him. Black Canary beating Ra's al Ghul isn't super surprising because it's just what she does.
Damian Wayne is the only son of Bruce Wayne and Talia al Ghul, and the only grandson of Ra's al Ghul.
Captain Adeline Kane would take Wilson under her wing after noticing his fighting skills and privately trained him in guerrilla warfare. After a year, Wilson had mastered every fighting form he was trained in and was awarded the rank of Lieutenant Colonel.
9 Ra's al Ghul
He's been a prime mover of history, working behind the scenes, and has first-hand knowledge of many of the world's most important events. The amount of knowledge he's accumulated over the centuries of his lifetime is vaster than Batman could hope to match.
Slade Wilson was a former member of the League of Assassins who once served as Ra's al Ghul's right-hand and future heir until his dishonorable actions deemed him unworthy. Despite killing his former mentor and briefly seizing control of the League, Slade soon became the contract killer known as Deathstroke.
And now that things are heating up between the Green Arrow and Prometheus, it is Talia who can clue him in to Prometheus' true identity, as she trained him, as well.
In the DC comics, Talia is a daughter of Ra's al Ghul and lover of Bruce Wayne, also known as Batman, and the mother of their son, Damian Wayne, the fifth Robin. Though Talia is Nyssa's older sister in the Arrowverse, in the DC comics Nyssa is the older sister.
Conceived after Bruce impregnated Talia al Ghul, Damian was birthed through an artificial womb to spare Talia the labours of pregnancy. After being put into contact with a piece of the Chaos Shard, Damian quickly aged, turning four by the end of his first year of life. This birthing anomaly was known to few.
While Tony Stark is not the richest hero in all of movie history, his net worth of $12.4 billion is higher than Bruce Wayne's and one of the highest net worths in movie history.
Years before he became Batman, a youthful Bruce Wayne trained under a detective named Harvey Harris and used the alias Robin to hide his identity.
In the process they rescued an inmate, Bane, the protector of his young daughter in the prison. Talia and Bane were then trained by the League, but Bane was excommunicated by Ra's al Ghul for reminding Ra's of the hell he left his wife to die in and for loving Talia. Talia resented her father's decision.
In the post-Crisis DC Universe, Jason Todd was tortured and killed by The Joker in the infamous “A Death in the Family” storyline, and while Todd has been resurrected since then, it remains one of the Dark Knight's most tragic moments (and one of The Joker's cruelest).
Dick Grayson, formerly known as Robin, later known as the New Joker, is the main antagonist of Frank Miller's comic miniseries The Dark Knight Strikes Again. He was the former Robin, who turned into a murderous psychopath, because of Batman's actions to him as a child.
Batman has trained many young heroes as Robin, and while they have all been impressive on their own, DC just confirmed that one stands above the others in terms of power: Damian Wayne is the most powerful Robin.