Destruction of Lipetsk (Premysloides Dynasty)

Historical background
Lipetsk was merchant town destroyed by Mongols during their campaigns in 1284. After disintegration of Mongol Empire, Lipetsk restored independence and was able to repel various attacks of Russian princes and rulers of different realms. In exchange for peace and to prevent other attacks, Lipetsk in 1306 declared themself as city-state in style of oligarchic republic ruled by local landlords, members of guilds, elected representatives and military commanders and also allowed merchants, travelers and citizens of other realms to pass through Lipetsk under protection and with very low fees.

From 1315 and onward, Lipetsk growth in to prosperous and large city state with strong defense capabilities, well armed and trained militia and own mercenary corps that was rented to various rulers. Lipetsk main source of profits were bazaars, fairs and fees, as city was on important crossroad between Ryazan, Tula, Voronezh, Kursk and Moscow.