Some Presbyterian traditions adopt only the Westminster Confession of Faith as the doctrinal standard to which teaching elders are required to subscribe, in contrast to the Larger and Shorter catechisms, which are approved for use in instruction. Many Presbyterian denominations, especially in North America, have adopted all of the Westminster Standards as their standard of doctrine which is subordinate to the Bible. These documents are Calvinistic in their doctrinal orientation. The Presbyterian Church in Canada retains the Westminster Confession of Faith in its original form, while admitting the historical period in which it was written should be understood when it is read.
What traditions do some Presbyterian churches only adopt as their doctrinal standard?
Westminster Confession of Faith

The devotio was the most extreme offering a Roman general could make, promising to offer his own life in battle along with the enemy as an offering to the underworld gods. Livy offers a detailed account of the devotio carried out by Decius Mus; family tradition maintained that his son and grandson, all bearing the same name, also devoted themselves. Before the battle, Decius is granted a prescient dream that reveals his fate. When he offers sacrifice, the victim's liver appears "damaged where it refers to his own fortunes". Otherwise, the haruspex tells him, the sacrifice is entirely acceptable to the gods. In a prayer recorded by Livy, Decius commits himself and the enemy to the dii Manes and Tellus, charges alone and headlong into the enemy ranks, and is killed; his action cleanses the sacrificial offering. Had he failed to die, his sacrificial offering would have been tainted and therefore void, with possibly disastrous consequences. The act of devotio is a link between military ethics and those of the Roman gladiator.
By dying what did Decius avoid for the battle?
disastrous consequences

Greek-speaking communities of the Hellenized East were instrumental in the spread of early Christianity in the 2nd and 3rd centuries, and Christianity's early leaders and writers (notably St Paul) were mostly Greek-speaking, though generally not from Greece itself. The New Testament was written in Greek, and some of its sections (Corinthians, Thessalonians, Philippians, Revelation of St. John of Patmos) attest to the importance of churches in Greece in early Christianity. Nevertheless, much of Greece clung tenaciously to paganism, and ancient Greek religious practices were still in vogue in the late 4th century AD, when they were outlawed by the Roman emperor Theodosius I in 391-392. The last recorded Olympic games were held in 393, and many temples were destroyed or damaged in the century that followed. In Athens and rural areas, paganism is attested well into the sixth century AD and even later. The closure of the Neoplatonic Academy of Athens by the emperor Justinian in 529 is considered by many to mark the end of antiquity, although there is evidence that the Academy continued its activities for some time after that. Some remote areas such as the southeastern Peloponnese remained pagan until well into the 10th century AD.
Which Emperor closed the school in Athens?
Justinian