Year 1402 (MCDII) was a common year starting on Sunday of the Julian calendar.
The 1380s was a decade of the Julian Calendar which began on January 1, 1380, and ended on December 31, 1389.
The 910s decade ran from January 1, 910, to December 31, 919.
Year 1506 (MDVI) was a common year starting on Thursday of the Julian calendar.
The 1350s was a decade of the Julian Calendar which began on January 1, 1350, and ended on December 31, 1359.
The 1360s was a decade of the Julian Calendar which began on January 1, 1360, and ended on December 31, 1369.
Year 1388 (MCCCLXXXVIII) was a leap year starting on Wednesday of the Julian calendar.
Year 1394 (MCCCXCIV) was a common year starting on Thursday of the Julian calendar.
The 1420s decade ran from January 1, 1420, to December 31, 1429.
The 1410s decade ran from January 1, 1410, to December 31, 1419.
The 1390s was a decade of the Julian Calendar which began on January 1, 1390, and ended on December 31, 1399.
The 1370s was a decade of the Julian Calendar which began on January 1, 1370, and ended on December 31, 1379.
The 1330s was a decade of the Julian Calendar which began on January 1, 1330, and ended on December 31, 1339.
Year 1362 (MCCCLXII) was a common year starting on Saturday of the Julian calendar.
Year 1422 (MCDXXII) was a common year starting on Thursday of the Julian calendar.
Year 1254 (MCCLIV) was a common year starting on Thursday of the Julian calendar.
Year 1279 A.D (MCCLXXIX) was a common year starting on Sunday of the Julian calendar.
The Byzantine–Bulgarian wars were a series of conflicts fought between the Byzantine Empire and Bulgaria which began after the Bulgars conquered parts of the Balkan peninsula after 680 AD. The Byzantine and First Bulgarian Empire continued to clash over the next century with variable success, until the Bulgarians, led by Krum, inflicted a series of crushing defeats on the Byzantines. After Krum died in 814, his son Omurtag negotiated a thirty-year peace treaty. Simeon I had multiple successful campaigns against the Byzantines during his rule from 893 to 927. His son Peter I negotiated another long-lasting peace treaty. His rule was followed by a period of decline of the Bulgarian state.
The Bulgarian–Ottoman wars were fought between the kingdoms remaining from the disintegrating Second Bulgarian Empire, and the Ottoman Empire, in the second half of the 14th century. The wars resulted in the collapse and subordination of the Bulgarian Empire, and effectively came to an end with the Ottoman conquest of Tarnovo in July 1393, although other Bulgarian states held out slightly longer, such as the Tsardom of Vidin until 1396 and the Despotate of Dobruja until 1411. As a result of the wars the Ottoman Empire greatly expanded its territory on the Balkan peninsula, stretching from the Danube to the Aegean Sea.
The 1400s ran from January 1, 1400, to December 31, 1409.
