Seydlitz's first months as a cornet were made difficult by the regimental colonel, who considered him a spy for the margrave, and abused him by sending him on useless errands and generally making it clear that the cornet was no match for the colonel. Within a year of Seydlitz's commission, the old King Frederick William died and his son,
Frederick II of Prussia, ascended to the throne. Frederick claimed
Silesia from the
Habsburg's
Maria Theresa, and made a broad appeal to arms. The Margrave's regiment played an important role in the ensuing war, during which Seydlitz came to the notice of the king several times. Once, when Frederick asked the caliber of the artillery shelling the Prussian line, opinions were divided and vague. Seydlitz rode in front of the battery, halting in their line of fire. When he saw a ball hit the ground, he picked it up, wrapped it in his handkerchief and presented it to the king. On 22 May 1742, near Opawa (Troppau) in Silesia, while stationed with his regiment in
Kranowitz, during the
First Silesian War, the regimental colonel ordered him to take 30 men and hold a village post until infantry came to his assistance; despite heavy fire, the grudging colonel did not send reinforcements. Realizing what had happened, the brigade's general took three squadrons of
heavy cavalry to relieve Seydlitz, but these were turned back by fire from the Austrian line. Subsequently, Seydlitz was forced to surrender his small unit. He entered into Austrian captivity with several of his closest comrades, including
Charles de Warnery. Frederick exchanged an Austrian captain for Cornet Seydlitz. Upon his return from captivity, Seydlitz had a choice to wait for the first lieutenancy that became available in a
cuirassier regiment, or take the immediate command of a troop of
hussars, as a captain. Hussars were the newest form of service in the Prussian army, and not as prestigious an assignment as cuirassiers, but Seydlitz chose the immediate promotion to a lesser unit. In 1743, the king made him a
Rittmeister (captain) in the 4th Hussars. He entirely skipped the rank of
lieutenant. With the 4th Hussars, he was stationed in the city of
Trebnitz, and he brought his squadron to a state of conspicuous efficiency. In August 1744, the king entered
Bohemia, took
Prague, and then moved south. Lieutenant General Count Nassau led the vanguard, and Seydlitz participated with the Natzmer Hussars, commanded by Major
Hans Heinrich Adam Schütz, a violent man of whose conduct of warfare Seydlitz disapproved. Seydlitz served through the
Second Silesian War. On 22 May,
Hans Karl von Winterfeldt, trusted by the king as a good judge of character, reported to Frederick: "Certainly, at
Hohenfriedberg, on the 4 June, [Seydlitz] captured the
Saxon general [Georg Sigismund] von Schlichting personally, after he had cut the reins from him." Based largely on his conduct at Hohenfriedberg and Winterfeldt's recommendation, Frederick promoted Seydlitz to major on 28 July at the unusually young age of twenty-four. Seydlitz led his squadron at the
Battle of Soor on 30 September, scouting the enemy's position before the battle, and then participating in the action. He was also present in the engagement at
Katholisch-Hennersdorf on 23 November, which proved convincingly to Frederick the benefit of close support during a cavalry charge. At the successful action on 27 November, Seydlitz led 15 squadrons in an attack on the Austrian rear guard. The Austrians were dispersed and nearly destroyed.
Development of cavalry tactics , in a section of a
history painting by
Richard Knötel. After Frederick concluded the peace on 25 December 1748, Seydlitz returned with his squadron to Trebnitz. In the subsequent years of peace, Seydlitz developed
flexible cavalry tactics. He assembled a plan on tactical form and training for the Prussian cavalry and presented it to the king. Frederick approved the procedures and Seydlitz established a rigorous training program. He would leave his own estate by jumping the gate; he required similar horsemanship from all his men, regardless of whether they were cuirassiers, hussars or
dragoons. They had to be capable of galloping across broken fields, wheeling in formation, and riding in close action. Furthermore, they had to be prepared to support any movement of infantry, or to react to any action from the enemy. Under Seydlitz's direction, possibly influenced by the ideas of
Frederik Sirtema van Grovestins, Prussian cavalry learned to use only their swords, as pistols or carbines could not be fired with accuracy and had to be reloaded. Frederick set up straw dummies for his troopers to shoot; their shots were woefully inaccurate, but Seydlitz's tactics demonstrated that the troopers could hit their target with a sword every time. Generally, cavalry horses were the sturdy
Trakehners, from Frederick's
stud farm in
Trakehnen, East Prussia. On 21 September 1752, after a successful review in which the different cavalry forms demonstrated their competencies, the king promoted Seydlitz to
lieutenant colonel and the commander-in-chief of cavalry and, on 13 October of the same year, to the commander of the Dragoon Regiment Württemberg No. 12, whose staff was at
Treptow. Frederick was not satisfied with the regiment's performance, and instructed Seydlitz to "put it back into order". In 1753 Frederick appointed Seydlitz to the command of the 8th Cuirassiers. In Seydlitz's hands, this regiment soon became a model for the rest of the Prussian Army's mounted force. In 1755 Frederick promoted him to
colonel. By the start of the
Seven Years' War, Seydlitz's transformed cavalry had become Frederick's pride and joy: it had unrivaled training and an
esprit de corps bolstered by Frederick's confidence in its members, and by their confidence in Seydlitz. The king had issued orders that no Prussian cavalryman would allow himself to be attacked without a commensurate response, under penalty of being cashiered; consequently, Prussian cavalrymen were active, impetuous and aggressive. For the king, Seydlitz's cavalry became the dynamic factor in the army of the state, and would be the tool by which Frederick could challenge empires. In 1756, Seydlitz's cavalry became Frederick's weapon of choice. ==Seven Years' War==