« A.U.C. 526 = 228 B.C. »

The Fasti Triumphales record that Cn. Fulvius Centumalas, cos. A.U.C. 525 = 229, celebrated a triumph on a.d. X Kal. Quint. of this year for a naval victory in the first Illyrian War fought during his consulate. On a consular term starting on Kal. Mai. there was about 7 weeks between the end of his term and his triumph; on a term starting on Id. Mart. there was about 14. Polybius 2.12.3 states that peace was concluded in the early spring, while he was still consul, i.e. in March 228. There being no obvious reason to delay the triumph, we would expect that the peace was concluded pretty close to the end of his consular term.

Since there were 7 intercalations between A.U.C. 537 = 217 and A.U.C. 564 = 190, the most recent year whose dates are certain, the following table gives the possible date ranges for Kal. Mai. A.U.C. 526 assuming 7-18 intercalations after this date and before A.U.C. 564 = 190.

Number of Intercalations   Number of intercalated days      Kal. Mai. A.U.C. 526
     A.U.C. 526-564                                                           

              7                               154-161                      19-24 Aug. 228
              8                               176-184                      27 July - 4 Aug. 228
              9                               198-207                      4-13 July 228
              10                              220-230                      11-21 June 228
              11                              242-253                      19-30 May 228
              12                              264-276                      26 Apr. - 8 May 228
              13                              286-299                      3-16 Apr. 228
              14                              308-322                      11-25 Mar. 228
              15                              330-345                      16 Feb. - 3 Mar. 228
              16                              352-368                      24 Jan. - 9 Feb. 228
              17                              374-391                      1-18 Jan. 228  
              18                              396-414                      9-27 Dec. 228

The Polybian synchronism gives us that there at most 14 intercalations between this year and A.U.C. 564 = 190. The fewer the number of intercalations, the longer the delay between the conclusion of peace and Fulvius' triumph. While this indication is not strong, it favours c. 12-14 intercalations.   The possible solutions are given in blue

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