Simon Thassi in the context of "Mattathias"

The Hasmonean dynasty (/hæzməˈniːən/; Hebrew: חַשְׁמוֹנָאִים Ḥašmōnāʾīm; Greek: Ασμοναϊκή δυναστεία) was the Jewish ruling dynasty of Judea during the Hellenistic times of the Second Temple period (part of classical antiquity), from c. 141 BC to 37 BC. Between c. 141 and c. 116 BC the dynasty ruled Judea semi-autonomously within the Seleucid Empire, and from roughly 110 BC, with the empire disintegrating, gained further autonomy and expanded into the neighboring regions of Perea, Samaria, Idumea, Galilee, and Iturea. The Hasmonean rulers took the Greek title basileus ("king") and the kingdom attained regional power status for several decades. Forces of the Roman Republic intervened in the Hasmonean Civil War in 63 BC, turning the kingdom into a client state and marking an irreversible decline of Hasmonean power; Herod the Great displaced the last reigning Hasmonean client-ruler in 37 BC.

Simon Thassi established the dynasty in 141 BC, two decades after his brother Judah Maccabee (יהודה המכבי Yehudah HaMakabi) had defeated the Seleucid army during the Maccabean Revolt of 167 to 160 BC. According to 1 Maccabees, 2 Maccabees, and the first book of The Jewish War by historian Josephus (37 – c. 100 AD), the Seleucid king Antiochus IV Epiphanes (r. 175–164) moved to assert strict control over the Seleucid satrapy of Coele Syria and Phoenicia after his successful invasion of Ptolemaic Egypt (170–168 BC) was turned back by the intervention of the Roman Republic. He sacked Jerusalem and its Temple, suppressing Jewish and Samaritan religious and cultural observances,and imposed Hellenistic practices (c. 168–167 BC). The steady collapse of the Seleucid Empire under attacks from the rising powers of the Roman Republic and the Parthian Empire allowed Judea to regain some autonomy; however, in 63 BC, the kingdom was invaded by the Roman Republic, broken up and set up as a Roman client state.

Hasmonean Judea, also known in part of its history as the Hasmonean kingdom, was an independent Jewish state in Judea and its surrounding regions, during the Hellenistic era of the Second Temple period. The Hasmonean state emerged from the Maccabean revolt against Seleucid rule. It was ruled by the Hasmonean dynasty, who descended from the Maccabees, and combined the offices of high priest and ethnarch, later assuming the title of kings. Initially, Judea remained semi-autonomous under the Seleucid Empire, but as Seleucid authority declined, the Hasmoneans gained full independence and expanded their territory into neighboring regions, including Perea, Samaria, Idumea, Galilee, and Iturea.

The Maccabees launched their revolt against the Seleucids in the 160s BCE, with Judas Maccabeus's victories and the rededication of the Jerusalem Temple following its desecration by the Seleucids. After Judas's death in battle, his brother Jonathan revived the movement, secured Seleucid recognition, and was appointed High Priest. Following Jonathan's execution, their brother Simon took command, expelled the Seleucid garrison from Jerusalem, and achieved independence, marking the foundation of the Hasmonean state. Simon was later assassinated by his son-in-law.

1 Maccabees, also known as the First Book of Maccabees, First Maccabees, and abbreviated as 1 Macc., is a deuterocanonical book which details the history of the Maccabean Revolt against the Seleucid Empire as well as the founding and earliest history of the independent Hasmonean kingdom. It describes the promulgation of decrees forbidding traditional Jewish practices by King Antiochus IV Epiphanes and the formation of a rebellion against him by Mattathias of the Hasmonean family and his five sons. Mattathias's son Judas Maccabeus (Judah Maccabee) takes over the revolt and the rebels as a group are called the Maccabees; the book chronicles in detail the successes and setbacks of the rebellion. While Judas is eventually killed in battle, the Maccabees eventually achieve autonomy and then independence for Judea under the leadership of the Hasmonean family. Judas's brother Simon Thassi is declared High Priest by will of the Jewish people. The time period described is from around 170 BC to 134 BC.

The author is anonymous, but he probably wrote in the newly independent Hasmonean kingdom after the success of the Maccabean Revolt in the late 2nd century BC. 1 Maccabees was probably written in Hebrew originally. However, this original Hebrew has been lost, and the work only survives in translation in Koine Greek contained in the Septuagint, the Greek version of the Jewish scriptures. The Septuagint was preserved by early Christians as the basis for the Christian Old Testament. It became part of the deuterocanon in early Christianity. The book is held as canonical scripture today in the Catholic, Eastern Orthodox, and Oriental Orthodox churches (except for the Orthodox Tewahedo). The book is not part of the Hebrew Bible (Tanakh) and is not considered canonical by Protestant denominations nor in any of the major branches of Judaism. Some Protestants include the book as biblical apocrypha, material useful for background and edification but that is not canonical. Rabbinic Judaism generally disapproved of the rule of the Hasmonean dynasty, but the book is openly pro-Hasmonean, one of several factors for a lack of enthusiasm for the book within later Judaism.

John Hyrcanus (/hɜːrˈkeɪnəs/; Hebrew: יוחנן הרקנוס, romanized: Yoḥānān Hurqanos; Koine Greek: Ἰωάννης Ὑρκανός, romanized: Iōánnēs Hurkanós) a Jewish high priest and ruler of Judea from the Hasmonean dynasty (born 164 BCE, reigned from 134 BCE until he died in 104 BCE). In rabbinic literature he is often referred to as Yoḥanan Cohen Gadol (יוחנן כהן גדול‎), "John the High Priest". John combined political and religious authority and secured Judea's independence from Seleucid control. His reign consolidated the Hasmonean state, expanded its territorial boundaries, and incorporated neighboring populations, laying the foundation for the policies and territorial expansions of subsequent Hasmonean rulers.

Hyrcanus assumed power following the assassination of his father, Simon Thassi, a brother of Judas Maccabeus, by Ptolemy ben Abubus near Jericho. He escaped the attack that killed his father and some of his brothers and was accepted as high priest in Jerusalem. Initially, he maintained relations with the Seleucid Empire, paying tribute while preserving autonomy and participating in military campaigns under Antiochus VII Sidetes, including operations against the Parthians. However, after Antiochus VII's death in 129 BCE, Hyrcanus ceased tribute payments and acted independently, establishing the de facto sovereignty of Judea.