Military Organization in the Polish and Lithuanian States, from Medieval Service to the Commonwealth

Military organization in the Polish and Lithuanian states changed as rulers and political institutions sought forces for frontier defense, wars, and internal conflict. In the medieval Kingdom of Poland, noble service, a small paid force, and troops hired for particular campaigns served different purposes. The Grand Duchy of Lithuania maintained a separate military tradition. The Union of Lublin in 1569 joined the two states in the Polish–Lithuanian Commonwealth, but did not merge their armies into a single institution: the Crown, as the Polish part was known, and the Grand Duchy retained distinct forces and commanders.

Military service drew on noble landholders, hired soldiers, peasants on royal estates, Cossacks, Tatars and the forces of towns and great landowners. Raising an army therefore meant combining several forms of obligation and payment. A noble cavalry retinue brought its own equipment; a hired infantry company required wages; and every campaigning force needed food, fodder, transport and ammunition.

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Medieval service and the Crown’s paid forces

In fifteenth-century Poland, one source of military service was the pospolite ruszenie, a general levy of mostly noble landholders. It could be called up in wartime, but was not a permanent standing army. The Crown also maintained the obrona potoczna, or continuous defense, a paid force of roughly 1,500 to 3,000 men. It was usually stationed along the troubled southern and eastern borders. A third arrangement, the wojsko zaciężne, consisted of troops recruited for a particular conflict. Polish commanders led these forces, which were disbanded when the campaign ended.

These arrangements combined different kinds of obligation and control. The levy depended on the service of noble landholders; the continuous-defense force was maintained by the king; and campaign troops were assembled when needed. In 1562–1563, the Polish parliament, the Sejm, legislated a more regular source of support for the paid force. The resulting wojsko kwarciane took its name from the kwarta, a tax on royal estates in royal lands assigned to its upkeep. It usually numbered around 3,000 to 5,000 men in peacetime and consisted mostly of noble cavalry. The Sejm could authorize temporary increases during war.

Two armies within the Commonwealth

The Union of Lublin created a shared Commonwealth while preserving separate Crown and Grand Duchy armies. Each had its own Grand Hetman and Field Hetman, giving the two states distinct senior commanders. The Grand Duchy’s army is estimated to have made up about a quarter to a third of the Commonwealth’s military. Their treasuries and commanders had to cooperate when their forces took the field together.

The Crown and Lithuanian armies faced the Ottoman Empire in the south, Muscovy and later Russia in the east, and Sweden in the north. These fronts posed different demands. Raiding threatened settlements and captives on the southern frontier, while northern and eastern campaigns often involved fortified places and extended sieges. The combination of mounted troops, infantry and artillery had to suit the campaign and the available resources.

Commanders and the structure of units

The office of hetman developed in the late fifteenth century as armies hired for campaigns created a need for experienced commanders. By the 1530s, hetman offices existed in parallel in Poland and Lithuania. From 1581 they were formally lifelong appointments. The king stood above the commanders in the military hierarchy, while the two Grand Hetmans and two Field Hetmans led the Crown and Grand Duchy forces. Hetmans could administer summary justice in the field. A deputy, the regimentarz, could take a hetman’s place temporarily.

Commonwealth forces were divided into what were called national and foreign contingents. These terms described different unit traditions, regulations and officer cadres. Foreign-style formations included infantry and artillery, as well as dragoons, mounted troops who could dismount to fight with firearms, and reiters, cavalry associated with pistols and other firearms. Foreign recruits made up a notable part of some more elite infantry units in the earlier period, but from the 1630s most regular recruits in both contingents came from within the Commonwealth.

The national contingent used a traditional structure built around the chorągiew, or banner-sized unit. A rotmistrz commanded a banner, whose smaller retinues were called poczet. Each retinue was based around a towarzysz, or companion, and a variable number of armed retainers. A banner might number from about 60 to 300 men. Two or more banners could form a pułk, led by a pułkownik; the number of banners varied, and large groupings were exceptional. Foreign-style forces were organized differently, commonly in regiments of about 500 to 1,000 men divided into companies. King John III Sobieski tried in the 1670s to replace the distinction between the two contingents with a unified organization based on infantry, cavalry, and dragoons. The change took many decades to take effect.

Recruitment beyond the noble levy

Noble cavalry and hired troops were only part of the system. Under Stephen Báthory, the Crown established the piechota wybraniecka, or selected infantry, from royal estates. The arrangement selected a man from each group of twenty units of land. The other nineteen were to carry the dues from which the chosen holding was exempt, enabling its occupant to undertake military service. This transferred some of the cost of maintaining an infantryman to the surrounding estate community. Hajduk infantry, organized in a Hungarian style and equipped with firearms, also served in the late sixteenth and seventeenth centuries.

A first Cossack register was established in 1572 and developed further under Báthory. Cossacks were armed frontier communities associated with the Dnieper lands. Entry in the register entitled a man to paid service and privileges, including exemption from the obligations of a dependent peasant. Disputes over who qualified for these rights contributed to repeated uprisings. The settlement of Zboriv in 1649 provided for a register of 40,000, showing how negotiations during rebellion could greatly enlarge the recognized force.

The Lithuanian army also drew on Lipka Tatars, who lived in Lithuania and served in light and medium cavalry units. Other forces came from local and private institutions. Beginning in 1613, districts raised żołnierz powiatowy, or district soldiers, as central government inefficiency and external threats increased. Powerful magnates maintained private forces at their own expense. These could range from small peacetime regiments to much larger forces, including cavalry and artillery, but magnates might withhold them if the state did not compensate their costs. Some towns also organized guards and militias. Gdańsk, for example, had twelve infantry companies with a total of 6,000 men in 1646.

The king maintained a smaller royal guard, which numbered about 1,200 in peacetime and could be enlarged during war. It included cavalry and infantry. There were also irregular forces, such as the early seventeenth-century Lisowczyks, who lacked official pay but operated with government permission and could keep their loot. Mobilizing these forces required agreements with commanders, local assemblies and estate owners as well as decisions at the royal court.

Finance, supply, and the fighting arms

Regular forces depended on decisions about taxation and the allocation of revenue. In the mid-seventeenth century, the wojsko zaciężne and wojsko kwarciane were judged insufficient. The Sejm established the wojsko komputowe, named after the parliamentary document that set its size. It numbered 26,000 in 1649. The wojsko kwarciane was disbanded in 1652, and the revenue from the kwarta was redirected to artillery. A new tax supported artillery reforms in the 1630s, when the office of General of the Artillery was also introduced. Artillery had initially been staffed by foreigners.

Army totals could rise sharply during crisis, but maintaining them was difficult. In 1659, after years of war, the reformed military numbered about 54,000 to 60,000. It declined afterward as the impoverished state struggled to pay for such a force. Cavalry remained central to the armies, while infantry had a lower reputation among the nobility. Yet the forces were mixed: national-contingent cavalry served alongside infantry, foreign-style cavalry and dragoons, and artillery.

Hussars were armoured lance cavalry organized through companions and their retinues. They fought alongside Polish pancerni, commonly protected by mail armour, Lithuanian mounted formations called petyhorcy and lighter mounted troops suited to reconnaissance and pursuit. Infantry could defend positions and deliver firearm volleys, while artillery supplied heavier fire against troops or fortifications. At Klushino in 1610, infantry and light cannon helped open gaps in fences that had obstructed hussar attacks, illustrating how these arms could support one another.

Supplying armies was a persistent challenge. The Commonwealth lacked a centralized logistical system, and its forces consequently depended on large trains of baggage wagons carrying supplies. These wagons could also be arranged for defense. Cossack forces developed the defensive use of the tabor, a formation of military wagons, and other Commonwealth forces used it to a lesser extent. The system could serve both practical needs and battlefield defense, but the wagon trains added to the burdens of moving an army. The problem was closely connected to political organization: revenue and military decisions required the cooperation of institutions that did not always provide enough money or coordination.

Naval efforts and the limits of central power

Despite the Commonwealth’s access to the Baltic Sea, its navy remained small and played a minor role. During sixteenth-century conflicts in Livonia, Sigismund II Augustus supported privateers, privately operated ships authorized to attack enemy forces. Opposition from commercial interests in Gdańsk contributed to the development of a privateer port at Puck. In the seventeenth century, the Vasa kings tried to build a fleet. Władysław IV bought twelve ships and established a dedicated naval port, but the royal treasury lacked funds and the Sejm’s noble members resisted taxation. The ships were sold between 1641 and 1643, ending that royal fleet programme.

The difficulty of financing a fleet reflected broader limits on the state’s ability to maintain forces. The Commonwealth won major campaigns and battles in its early period, including Kircholm and Klushino, and its forces entered Moscow in 1610. But the Khmelnytsky Uprising, the war with Russia from 1654 to 1667, and the Swedish Deluge in the 1650s brought severe losses. The Truce of Andrusovo in 1667 recognized Russian control of left-bank Ukraine, east of the Dnieper, as well as Smolensk and Kyiv. The relief of Vienna in 1683 was another major victory, but it did not resolve the longer-term problems of military finance and administration.

In 1717, the Silent Sejm, a parliamentary session held under Russian dominance, set the army’s stated size at 24,200: 18,000 for the Crown and 6,200 for Lithuania. Insufficient taxation meant that units were often underfunded and unpaid. The army was small compared with those of neighboring powers, and unpaid troops sometimes formed confederations, occupying Commonwealth territory until they received payment or obtained resources by plundering. The army’s stated establishment therefore did not guarantee that the same number of properly supported soldiers could take the field.

Reform efforts gathered pace under Stanisław II Augustus, elected in 1764. The Permanent Council, established in 1775, included a Military Department that sought to modernize and enlarge the army, though its target of 30,000 was not reached. The Great Sejm voted in 1788 for an army of 100,000 and sought wider means of recruitment and taxation. The Constitution of 3 May 1791 strengthened the government responsible for supporting defence. The plan was never fully implemented. The army grew to about 65,000 before the Commonwealth’s defeat in the war of 1792; it was then reduced to about 36,000. A Russian demand for a further reduction to 15,000 helped spark the Kościuszko Uprising of 1794. Military reform could not overcome the Commonwealth’s political and financial constraints before the final partitions of 1795 ended the state.