Eagles of the Empire

Macro, a veteran with 16 years service (as of the first novel's opening) has recently been appointed to the Centurionate. He is the epitome of a good soldier: dependable in a fight and does not question any orders given to him by a senior officer. In Under the Eagle he is the centurion of the Sixth Century, of the Fourth Cohort, of the Second Augustan Legion. By the time of The Eagle in the Sand he has risen to become the acting prefect in charge of Fort Bushir in Judea. In The Legion Cato and Macro join a legion in Egypt, with Macro receiving a temporary promotion to Primus Pilus ("First Spear" Centurion).

Macro has been close friends with Cato since Cato saved his life in the first book. This bond deepens when Macro confesses that he is illiterate and asks Cato's help in learning to read, and so maintain his position as an officer.

His approximate age, based on his previous service, years traveling with Cato and his joining age as revealed in a short story at the end of Centurion (it was revealed he was 16, joined after killing a gang leader). This makes Macro as of the 20th book, 48.

Cato is the son of an Imperial Freedman (former slave) in direct service of Emperor Claudius. Being born a slave himself, and the property of the state, he was given an opportunity by the Emperor as a favour to Cato's late father to enlist in the legions and be given his freedom. Cato has lived a relatively luxurious life as a slave within the Imperial palace, in comparison to the rank and file of the legions, and after accepting the Emperor's offer. he joins the Second Augustan as Macro's Optio.

In the first novel, he is only seventeen years of age, tall and gawky, and so weak-looking that many of the officers, including Macro, place bets on how long it will be before he quits, or is killed. The Emperor grants Cato an immediate commission as a Centurion, but because of his age, Vespasian makes him an optio as a compromise, which causes the officers and his fellow recruits to resent him further. He is however, extremely determined and proves the officers wrong throughout the series. Cato attains the rank of Centurion at the end of When the Eagle Hunts and during the events of Centurion, he is promoted to acting prefect of the Second Illyrian. Halfway through The Gladiator Cato is promoted to the rank of tribune for his mission to Egypt, temporarily outranking Macro, but at the end of the book he is awarded a temporary rank of prefect. In The Legion Cato joins a legion in Egypt and receives a temporary promotion to Senior Tribune.

Because of his palace upbringing, Cato is well-read, often portrayed as more cerebral and forward-thinking than Macro. Macro is dismissive of this at first, but eventually comes to respect Cato's talent for thinking ahead and seeing "the big picture."

First appears in Centurion. Daughter of Senator Sempronius, the Emperor's ambassador to the court of Palmyra. Both Romans are trapped in the citadel while it is under siege by an army led by one of the King's rebellious sons. Refusing to be put aside as a "helpless woman," Julia helps to nurse the casualties in the citadel's makeshift field hospital. She meets Cato there, and becomes his lover and accepts his proposal of marriage. While traveling back to Rome, she and her father are shipwrecked on Crete with Macro and Cato, where she is captured by the rebel leader Ajax, but manages to escape. Cato eventually learns of her death from an undisclosed illness in Britannia. Cato learns of Julia's unfaithfulness upon his return to Rome in Invictus, however in "Days of the Caesars" she is revealed to have been faithful by Domitia (Vespasian's wife), using her supposed infidelity as a cover to raise funds on behalf of Brittanicus. However, Tribune Cristus (the man she supposedly had an affair with), gives an ambiguous answer as to whether they had an affair or not, when Cato confronts him at the end of the book, before he commits suicide.

Lavinia appears in the first two books and is the lover of both Cato and Vitellius. She is a slave-girl who is owned by Flavia, Vespasian's wife. In The Eagle's Conquest she betrays Cato and unwittingly helps Vitellius try to assassinate the Emperor. However, when the plot fails Vitellius kills both her and the assassin to cover himself.

First appears in The Eagle's Prophecy as the son of the Greek pirate leader Telemachus. He is captured by Macro and Cato and gives them and Vespasian the hiding place of the pirates and is used as a bargaining counter to make Telemachus surrender and hand over the Sibylline Scrolls to Vespasian. His father is crucified and Ajax is sold into slavery. He becomes a professional Secutor gladiator and is bought by a wealthy family on Crete, used both as a fighter and a sex slave by the household's wife. Freed when a massive earthquake devastates the island in The Gladiator, he leads an army of other escaped slaves and captures Macro and Julia but is defeated by Cato and his troops. However, he escapes in the end and returns in The Legion to further defy Cato and Macro by joining forces with the Nubians. Escaping capture several times, he is finally cornered by Macro and Cato in an Egyptian marsh and devoured by a crocodile.

• Vespasian: Legate of the Second Legion and Macro and Cato's commander in the first five books during the Roman conquest of Britain. Vespasian also appears in The Eagle's Prophecy as the Prefect of the naval fleet. Vespasian is often fighting in the front line with his men but is consistently at odds with his tribune Vitellius who threatens him with the knowledge that Vespasian's wife Flavia is a member of the dissident group who are conspiring to overthrow the Emperor.
• Flavia Domitilla: Vespasian's wife, who, he is chagrined to learn, is a member of the "Liberators," a group of conspirators plotting Claudius's assassination; however in Day of the Caesars, the conspirators have changed their target to Nero, hoping to allow Brittanicus to succeed his father. She also reveals that Julia was faithful to Cato. She kills herself when the coup fails.
• Titus: Vespasian's son, who appears as an infant in the first two novels.
• Vitellius: An imperial spy with disturbing ambition who attempts to steal Caesar's pay chest in Under the Eagle and assassinate the Emperor during The Eagle's Conquest, but is thwarted by Macro and Cato both times. In The Eagle's Prophecy he is the prefect of the naval fleet but is replaced by Vespasian who leaves him to die at one point. However Vitellius survives with the Emperor and Narcissus unaware of his attempted treason. At the end of the novel, he has also seen a snippet from the Sibylline prophecies captured from the pirates which convinces him that he is destined to become emperor.
• Narcissus: Claudius's Chief Secretary and effectively Prime Minister of the whole Empire. He recruits Macro and Cato for "special" tasks around the Empire, promising them rich rewards for success, but making it clear that their lives are of little value to him or the Empire.
• Claudius: Emperor of Rome, portrayed in The Eagle's Conquest and Praetorian as a forgetful, half-witted buffoon.
• Miriam, mother of Jehoshua, a crucified pacifist; appears in The Eagle in the Sand
• Caratacus: leader of the rebellious tribes of Britain.
• Boudicca: a young British noblewoman, who Macro becomes smitten with in the third novel, When the Eagle Hunts.
• Agrippina the Younger: the Emperor's wife and mother of Nero; appears in Praetorian;
• Nero: Claudius's stepson; appears in Praetorian;
• Brittanicus: Claudius's son; appears in Praetorian;
• Sextus Afranius Burrus: Praetorian Centurion, later prefect; appears in Praetorian;
• Gaius Ofonius Tigellinus: appears in Praetorian.
• Marcus Antonius Pallas: appears in Praetorian.
• Marcus Salvius Otho: appears in Brothers in Blood as a tribune

Books in the Eagles of the Empire series are first published in hardcover and are later re-released as paperback editions by Headline publishers.[62] In the US the first six books, the last being The Eagle's Prophecy were published by Thomas Dunne publishers (Macmillan publishers)[63] Since 2011 and the release of Praetorian each of the books are also released as audiobooks.[64] The series has also been translated into multiple different languages.[1] The page totals given to the right are for the UK first edition, hardcovers.

As of 12 March 2018 Scarrow has sold over 4 million copies of the books within Eagles of the Empire in English alone.[1]

Under the Eagle, the first in the series has had 5 different covers, the initial cover only being used for the 1st edition, hardcover. This was then updated on released of the paperback edition.[65] On release of the second novel The Eagle's Conquest the third version of the cover was used.[66] This remained until Scarrow started refraining from using 'Eagle' in the titles of the novels with the first release after this being Centurion in 2008 resulting in another re-brand.[67] The current branding was updated with the release of The Blood Crows in 2013.[65][68]

The novels since Under the Eagle first being published have contained the word 'Eagle' in the title however since the 8th book Centurion the author has refrained from using 'Eagle' - the reason for this is unknown, however some speculate that this has been done in effort to make the books accessible to a wider audience, and also explains the change in cover illustrations.

Scarrow has also stated that whilst initially he only planned to write around ten novels in the series this has since changed to 25. Scarrow also hinted at two potential endings for Eagles of the Empire. One being Cato and Macro facing each other on alternate sides of a battle during the Year of four Emperors, AD 69 resulting in the death of one of them. The other being their retirement in AD 69 in Pompeii.[69] This has significance due to the supporting and reoccurring characters through the series, Vespasian becoming Emperor at the end of that year.