One should know that the English word cross is incorrect to answer the question. According to Oxford Languages, a cross means an upright post with a transverse bar, as used in antiquity for crucifixion. It is not the Greek meaning of the word stauros! Stauros means an upright stake or beam. It is a piece of wood that comes from a tree. The Anchor Bible Dictionary, The New Catholic Encyclopaedia, Nelson's Illustrated Bible Dictionary, The Illustrated Bible Dictionary, 1980, The Catholic Encyclopaedia, The Classic Greek Dictionary, Greek-English and English-Greek, The Companion Bible, Appendix 162
The problem is accepting things without checking out the source. Mainly, history is a lacking source in the USA. Historically, the Romans were some of the cruelest executioners.
Nineteenth-century Anglican theologian E. W. Bullinger's Companion Bible glossed stauros as "an upright pale or stake," interpreting crucifixion as "hung upon a stake ... stauros was not two pieces of wood at any angle."
The σταυρός (stauros) was simply an upright pale or stake to which Romans nailed those who were thus said to be crucified; σταυρόω merely means to drive stakes. It never means two pieces of wood joining at any angle. Even the Latin word crux means a mere stake. The initial letter Χ, (chi) of Χριστός, (Christ) was anciently used for His name until it was displaced by the T, the initial letter of the pagan god Tammuz, about the end of the cent. iv. — A Critical Lexicon and Concordance to The English and Greek New Testament, 1877
"STAUROS....denotes, primarily, an upright pale or stake. On such, malefactors were nailed for execution. Both the noun and the verb stauroo, to fasten to a stake or pale, are originally to be distinguished from the ecclesiastical form of a two-beamed cross. The shape of the latter had its origin in ancient Chaldea and was used of the symbol of the god Tammuz (being in the shape of the mystic Tau, the initial of his name in that country and adjacent lands, including Egypt.
By the middle of the 3rd cent. A.D., the churches had either departed from or had travestied certain doctrines of the Christian faith. In order to increase the prestige of the apostate ecclesiastical system, pagans were received into the churches apart from the regeneration of faith and were permitted largely to retain their pagan signs and symbols. Hence, the Tau or T, in its most frequent form, with the cross-piece lowered, was adopted to stand for the cross of Christ." Vines Complete Expository Dictionary of Old and New Testament Words
The description of the actual symbol chosen by Emperor Constantine the next morning, as reported by Lactantius, is not very clear: it closely resembles a Tau-Rho or a staurogram (), a similar Christian symbol. On this very day, Constantine's army fought the forces of Maxentius and won the Battle of the Milvian Bridge (312) outside Rome.
An early visual representation of the connection between the Crucifixion of Jesus and his Resurrection, seen in the 4th-century sarcophagus of Domitilla in Rome, the use of a wreath around the Chi-Rho symbolizes the victory of the Resurrection over death. From Wikipedia, the free encyclopedia
Now, the answer is historically written. Now, the facts are given over false propaganda of the facts!