In what area were the Leičiai native to during 1219 and 1295?
Leičiai Leičiai (singular: leitis) were a distinct social group of the Lithuanian society in the early Grand Duchy of Lithuania subordinate to the Lithuanian ruler or the state itself. Leičiai were native to the Lietuva Land and formed the core of the Lithuanian society in the pre-state era and during the establishment of the state. Leičiai made up the majority of the military-economic staff of the state: they enforced state authority in the periphery, protected state borders, and performed various other war-related functions, such as breeding riding horses. By the 15th and 16th centuries, leičiai were in decline, already losing some of their functions and prestige, and they disappeared as a social class after the implementation of the Wallach Reform.
Old Prussians Old Prussians or Baltic Prussians (Old Prussian: "Prūsai"; German: "Pruzzen" or "Prußen"; Latin: "Pruteni" ; Latvian: "Prūši" ; Lithuanian: "Prūsai" ; Polish: "Prusowie" ; Kashubian: "Prësowié" ) refers to the indigenous peoples from a cluster of Baltic tribes that inhabited the region of Prussia. This region became the core of the later state of Prussia. It was located on the south-eastern shore of the Baltic Sea between the Vistula Lagoon to the west and the Curonian Lagoon to the east. The people spoke a language now known as Old Prussian and followed pagan Prussian mythology.