Peter I, was Tsar of all Russia from 1682, and the first Emperor of all Russia, known as Peter the Great, from 1721 until his death in 1725. He reigned jointly with his half-brother Ivan V until 1696. From this year, Peter was an absolute monarch, an autocrat who remained the ultimate authority and organized a well-ordered police state.
Gustav IV Adolf or Gustav IV Adolph was King of Sweden from 1792 until he was deposed in a coup in 1809. He was also the last Swedish monarch to be the ruler of Finland.
Charles XII, sometimes Carl XII or Carolus Rex, was King of Sweden from 1697 to 1718. He belonged to the House of Palatinate-Zweibrücken, a branch line of the House of Wittelsbach. Charles was the only surviving son of Charles XI and Ulrika Eleonora the Elder. He assumed power, after a seven-month caretaker government, at the age of fifteen.
The Battle of Narva on 30 November [O.S. 19 November] 1700 was an early battle in the Great Northern War. A Swedish relief army under Charles XII of Sweden defeated a Russian siege force three to four times its size. Previously, Charles XII had forced Denmark–Norway to sign the Treaty of Travendal. Narva was not followed by further advances of the Swedish army into Russia; instead, Charles XII turned southward to expel August the Strong from Livonia and Poland-Lithuania. Tsar Peter the Great of Russia took Narva in a second battle in 1704.
Suomenlinna, or Sveaborg, is a sea fortress composed of eight islands, of which six have been fortified; it is about 4 km southeast of the city center of Helsinki, the capital of Finland. Suomenlinna is popular with tourists and locals, who enjoy it as a picturesque picnic site. Originally named Sveaborg, or Viapori as referred to by Finnish-speaking Finns, it was renamed in Finnish to Suomenlinna in 1918 for patriotic and nationalistic reasons, though it is still known by its original name in Sweden and by Swedish-speaking Finns. Due to its strategic geographical location, it sometimes used to be known as Gibraltar of the North.
The history of Åland can be traced back to roughly 4000 BCE, when humans first reached the archipelago in the Neolithic period. Several Bronze Age villages have been found on Åland. During the Viking Age, six hillforts were built. Sweden controlled the Åland Islands from the 1200s until 1809, during which, Kastelholm Castle was the focal point of many battles. In 1809, the Russian empire took Åland and Finland. In 1854, British and French forces attacked Bomarsund. The Åland Islands were then demilitarised until 1906. In 1918, Swedish and German forces occupied the Åland Islands. After the Finnish Civil War, Åland joined Finland following the Åland Convention of 1921.
The Finnish War was fought between the Kingdom of Sweden and the Russian Empire from 21 February 1808 to 17 September 1809 as part of the Napoleonic Wars. As a result of the war, the eastern third of Sweden was established as the autonomous Grand Duchy of Finland within the Russian Empire. Other notable effects were the Swedish parliament's adoption of a new constitution and the establishment of the House of Bernadotte, the new Swedish royal house, in 1818.
Korela Fortress is a medieval fortress in the town of Priozersk, Leningrad Oblast, Russia.
Nyenschantz was a Swedish fortress at the confluence of the Neva River and Okhta River, the site of present-day Saint Petersburg, Russia. Nyenschantz was built in 1611 to establish Swedish rule in Ingria, which had been annexed from the Tsardom of Russia during the Time of Troubles. The town of Nyen, which formed around Nyenschantz, became a wealthy trading center and a capital of Swedish Ingria during the 17th century. In 1702, Nyenschantz and Nyen were conquered by Russia during the Great Northern War, and the new Russian capital of Saint Petersburg was established here by Peter the Great the following year.
Swedish Ingria was a dominion of the Swedish Empire from 1583 to 1595 and then again from 1617 to 1721 in what is now the territory of Russia. At the latter date, it was ceded to the Russian Empire in the Treaty of Nystad, at the end of the Great Northern War between the two empires.
The Ingrian War was a conflict fought between the Swedish Empire and the Tsardom of Russia which lasted between 1610 and 1617. It can be seen as part of Russia's Time of Troubles and is mainly remembered for the attempt to put a Swedish duke on the Russian throne. It ended with a large Swedish territorial gain in the Treaty of Stolbovo, which laid an important foundation to Sweden's Age of Greatness.
The Russo-Swedish War of 1554–1557, considered a prelude to the Livonian War of 1558–1583, arose out of border skirmishes. It ended when the parties agreed on a truce in the Treaty of Novgorod (1557). The war ended inconclusively.
The Russo-Swedish War of 1590–1595 was instigated by Boris Godunov in the hope of gaining the territory of the Duchy of Estonia along the Gulf of Finland belonging to Sweden since the previous Livonian War. As soon as the Truce of Plussa expired early in 1590, a large Russian army led by Godunov and his sickly brother-in-law, Feodor I of Russia, marched from Moscow towards Novgorod. On 18 January they crossed the river Narva, defeated a Swedish detachment in a counter battle and laid siege to the Swedish castle of Narva, commanded by Arvid Stålarm. Another important fortress, Jama (Jamburg), fell to Russian forces within two weeks. Simultaneously, the Russians ravaged Estonia as far as Reval (Tallinn) and Finland as far as Helsinki.
The Swedish–Novgorodian Wars were a series of armed conflicts during the 12th and 13th centuries, fought between the Novgorod Republic and medieval Sweden over control of the Gulf of Finland. Part of the trade route from the Varangians to the Greeks, the area was vital to the Hanseatic League. The clashes between Catholic Swedes and Orthodox Novgorodians had religious overtones, but before the 14th century there is no knowledge of official crusade bulls issued by the pope.
The Battle of Kalisz took place on 29 October 1706 in Kalisz, Polish–Lithuanian Commonwealth during the Great Northern War. The battle was fought between an anti-Swedish army of Russians, Saxons and Poles led by Augustus the Strong and Russian general Alexander Danilovich Menshikov, and a Swedish–Polish–Lithuanian army headed by colonel Arvid Axel Mardefelt, loyal to Stanisław Leszczyński. The battle, which occurred as peace had been concluded between Sweden and Saxony, marked Sweden's only major defeat in Poland during the war and temporarily secured a major part of Greater Poland for the coalition. However, they failed to exploit their success as Augustus returned to Saxony soon thereafter to abide by the peace treaty, while Charles XII sent a new corps of 8,000 Swedes into Greater Poland.
The Siege of Riga by the Russian army under Tsar Alexei Mikhailovich was the main event of the Russo-Swedish War. The fortifications of Riga consisted of a wall with ditch and 5 bastions around the old town. In 1652 Swedes had started construction of a new wall with 12 bastions around suburbs, but by 1656 the work had not been completed. The Russian vanguard consisting of the Vladimir v. Vizin reiters, Daniel Krafert infantry and Iunkmann dragoons approached Riga on August 20 and threw back the Swedes under count of Pärnu, Heinrich von Thurn into the city. Von Thurn was either killed, or captured in the action. The Swedes evacuated the suburbs and withdrew to the old town. A few days later, the main army under Tsar Alexei Mikhailovich arrived on the ships on the Duna River, and laid siege to Riga. The Russian army occupied three camps, two on the east bank of the Duna in Riga's suburbs, and a Corps under Ordyn-Nashokin on the west bank of the Duna, opposite the Kobrun entrenchment.
Battle of Hummelshof took place on July 19, 1702 (O.S.) near the small town Hummelshof in Swedish Livonia. It was the second significant Russian victory in the Great Northern War in which a Russian army under Boris Sheremetev attacked a much smaller force under Wolmar Anton von Schlippenbach and defeated it after experiencing similar casualties to the Swedes. This was a final blow to the Swedish force defending Livonia and the defeat left it fully open to Russian attacks.
Shlotburg was the name given by Peter the Great to Nyenschantz, a Swedish fortress of the 17th century. The name was sometimes used to denote all the downstream settlements and villages along the Neva River.
The Battle of Lode was fought during the Livonian War, between a Swedish and Russian army on 23 January 1573. The battle was won by the Swedes.
Swedish Empire 
Tsardom of Russia