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The Battle of Hetény, fought on 5 September 1849, between Hungarian Hussars led by General György Klapka and a Russian detachment of Cossacks was one of the last battles of the Hungarian War of Independence. After the surrender of the Hungarian army led by General Artúr Görgei at Szőlős, one of the last strongholds of the Hungarian independence was the fortress of Komárom, which now was being surrounded by Austrian and Russian troops. The small reconnaissance unit of Hungarian hussars which tried to acquire knowledge about the enemy's strength, was attacked by a platoon of Russian cossacks, but the Hungarians defeated them, using the tactic of feigned retreat. These kind of small scaled battles and skirmishes between Hungarian troops with the Austrian and Russian besieging units continued until the surrender of the fortress of Komárom on 2 October 1849.

Iža (Hungarian: Izsa, Hungarian pronunciation:[ˈiʒɒ]) is a village in south-western Slovakia.

Celemantia (or Kelemantia; the modern name of the site is Leányvár) was a Roman castellum and settlement on the territory of the present-day municipality Iža (Hun: Izsa), some 4 km to the east of Komárno in Slovakia. It is the biggest known Roman castellum in present-day Slovakia. It was a part of the Roman limes, the frontier-zone of the Empire. A Germanic settlement "Celemantia" in this area is mentioned by Claudius Ptolemaios in the 2nd century AD. It could be identical with the remnants of a civil settlement found next to the castellum or with another unknown settlement or, as some historians assume, it is the name of both the castellum and the remnants of the civil settlement. The construction of the castellum started in the 2nd half of the 1st century. It was conquered during the Marcomannic Wars (166–180) and burned down by Germanic tribes, and was rebuilt later. It ceased to exist around 400 (beginning of the Migration Period). The ruins were very well visible up to the late 18th century, but afterward people used stones from the constructions to build the fortress and other buildings in Komárno. According to a local legend, a Roman soldier, Valentin, kept his mistresses in the fortress. The fictitious story explains the origin of the name Leányvár, meaning Girl Castle in Hungarian. However, the name probably refers to the fact that the ruins of the castle were donated by King Béla IV of Hungary to the Dominican nuns of Margitsziget who later built a small fortress among them. In July 2021, Celemantia was added to the UNESCO's World Heritage List as part of the Western segment of the Danubian Limes of the Roman Empire.

Almásfüzitő is a village in Komárom-Esztergom county, Hungary. During the Oil Campaign of World War II, the Almásfüzitő oil refinery was bombed by the United States Army Air Forces.

Szőny was a town in Hungary. Since 1977, it has been part of the city of Komárom.

Naszály is a village in Komárom-Esztergom county, Hungary.

Komárno - Komárom fortification system is a system of forts, bastions, and fortifications in and around the towns of Komárno and Komárom (they were one town until the treaty of Trianon) on the banks of both the Danube and Váh rivers. The fortification system of town Komárno is the biggest fortification in Slovakia, and as a whole complex with fortifications on the Hungarian side of the Danube it is the biggest fortification in former Austro-Hungarian Empire.

The 1763 Komárom earthquake occurred in or near the town of Komárom in Komárom County in the Kingdom of Hungary on 28 June between 5 and 6 in the morning. The earthquake has been estimated at 6.2 to 6.5 on the moment magnitude scale.

Komárno District (Slovak: okres Komárno, Hungarian: Komáromi járás) is a district in the Nitra Region of western Slovakia. Until 1918, the district was mostly part of the Komárom county within the Kingdom of Hungary. The district has a population of 108.556 of which 74.976 (69.1%) are Hungarians and 30.079 (27.7%) are Slovaks (2001).

Fortress of Komárno, in Slovakia, is the central part of the Komárno fortification system at the confluence of the Danube and Váh rivers.

Komárno (Hungarian: Komárom, German: Komorn, Serbian: Коморан, romanized: Komoran), colloquially also called Révkomárom, Öregkomárom, Észak-Komárom in Hungarian; is a town in Slovakia at the confluence of the Danube and the Váh rivers. Historically it was formed by the "old town" on the left bank of Danube, present day Komárno in Slovakia, and by a "new town" on the right bank, present day Komárom in Hungary, which were historically one administrative unit. Following World War I and the Treaty of Trianon, the border of the newly created Czechoslovakia cut the historical, unified town in half, creating two new independent towns in two countries. Komárno and Komárom are connected by the Elisabeth Bridge, which used to be an official border crossing between Slovakia and Hungary until border checks were lifted due to the Schengen Area rules. In 2020, a new road bridge was opened.Komárno is Slovakia's principal port on the Danube. It is also the center of the Hungarian community in Slovakia, which makes up 53.8% (2011 census) of the town's population. The town is the historic seat of the Serbian national minority in Slovakia.

Komárom county (in Latin: comitatus Comaromiensis, in Hungarian: Komárom (vár)megye, in Slovak: Komárňanský komitát / Komárňanská stolica / Komárňanská župa, in German: Komorner Gespanschaft / Komitat Komorn) was an administrative county (comitatus) of the Kingdom of Hungary, situated on both sides of the Danube river. Today, the territory to the north of the Danube is part of Slovakia, while the territory to the south of the Danube is part of Hungary.