Ottoman Empire's dates stretched from 1299 to 1922. Across those six+ centuries, the Ottomans found success in battle and the wealth such wins brought, as well as power struggles and inevitable disorganisation. As humbly as this empire began, it ended. This article covers the time in between.
| 📅 Dates | 🌟 Event | 📝 Notes |
|---|---|---|
| 1299 | In Anatolia, Osman I proclaims the empire. | Osman, a regional leader, came to dominate neighbouring territories before his proclamation. |
| 1326 | Ottoman forces conquer Bursa. | That city became the Ottoman Empire's first capital. |
| 1453 | Mehmed II sacks Constantinople. | This conquest ends the Byzantine Empire. |
| 1517 | Selim I overtakes Egypt and the Holy Lands. | He accords himself the title of Caliph. |
| 1520–1566 | Suleiman the Magnificent rules during peak empire. | His empire's reach expanded into the Persian Gulf and Hungary. |
| 1529 | The Ottoman siege of Vienna. | This siege marked the height of Ottoman European expansion. |
| 1683 | The second siege of Vienna ends in defeat. | This failure to hold territory marks the beginning of Ottoman decline. |
| 1821 | The Greek War of Independence. | This Ottoman defeat led to Greek independence in 1830. |
| 1914 | The First World War begins. | The Ottomans fought alongside the Central Powers. |
| 1922 | Turkish War of Independence | This war abolished the monarchy. |
| 1923 | The Republic of Turkey is established. | Allied occupation of Istanbul spurred this action. |
Beginning the Ottoman Empire Timeline
The beginning of the Ottoman Empire came in part thanks to the Mongolian Empire decline. At its peak, the Mongols held vast lands, including areas of present-day Turkey and West Asia. The expanse made it hard for them to control everything, even with their decentralised system of government.
This Eastern Roman empire controlled eastern Mediterranean regions.
Mongolian forces dismantled the formerly Byzantine region overtaken by the Seljuk Sultanate of Rum. This created a power vacuum in Anatolia, which the Turks, under Osman, rushed to fill.
Osman's troops were a mottled bunch, consisting of Turkish tribal groups and renegade fighters who broke away from the Byzantine Empire. Under his command, they fought successive battles against Byzantine forces, claiming one victory after another. The Battle of Bapheus (1302) marks the rise of Osman as a leader1.
Unfortunately, few records from this period survive, if they existed at all. Uncertainty over the Ottoman Empire timeline clouds many important events, including the death of Osman I. Historians pinpoint his passing somewhere between 1323 and 1326, while Ottoman tradition pegs it at the later date. Whenever his passing was, his empire was well on its way by that time.
The name 'Ottoman' comes from Osman I.
Remaining historical sources list him as 'Othman' as well as Osman.
Taking Constantinople
After Osman I's passing, his son, Orhan, took control of the empire. He was no less ambitious, and no less a fighter than his father.
Under his leadership, Ottoman forces extended into the Balkans and Anatolia. Capturing Bursa, a major city in Northwestern Anatolia, was a major win.
Orhan declared that city his new capital, unseating Byzantine influence across the region.
As his troops expanded across the Balkans, taking Constantinople became an imperative2. That city held a strategic position on the Bosporus Strait, a key waterway connecting the Sea of Marmara to the Black Sea. Its optimal location made it that much harder to take.
And the Turks had other battles going on, besides. Between 1402 and 1453, they lost and regained territory through constant attacks and civil wars.
They wrested control over Anatolia from the Timurid Empire after a nearly 30-year battle, for example. Ottoman forces could finally focus on Constantinople in 1453.
Constantinople’s fall marked the end of the Roman Empire. Among his first acts after taking the city was declaring the Hagia Sophia a mosque. He then established Constantinople as the capital of the Ottoman Empire.
This city was alternately called Kostantiniyye, Constantinople, Stamboul, and Istanbul.
It was NOT dubbed “The City of Islam” after the conquest!
Ottoman Empire Map: Expansion Under SĂĽleyman
SĂĽleyman the Magnificent ruled from 1520 to 1566, becoming one of the world's great empires over that time. Under his administration, the Ottoman state established and consolidated administrative processes. It also continued its military actions, securing vast territories3.
By the time he ascended, the Ottoman Empire was already cataloguing an extensive production of art. These cultural endeavours complemented, rather than clashed with, military conquests and commercial trade. Many historians consider this period the height of Ottoman cultural and governmental development. In fact, those developments continued after Süleyman’s passing in 1566.
Ottoman Empire History: Government Structures and Style
Like the Russian Empire, the Ottomans had a system of absolute monarchy: the Sultan made every decision, which the lower ranks carried out4.
By necessity, the central government had to decentralise; at least, to an extent. This empire comprised people of different nations and religions, who spoke different languages and different customs. Governing arrangements varied by region, depending on local customs and practices. Those arrangements shifted over time, depending on how insistent the Sultan was of his power.
Non-Muslim populations could maintain their marriage and inheritance traditions.
However, they remained obligated to the empire through taxation.
Otherwise, Ottoman society broke into a ruling class and protected subjects. Those in the ruling class held the most important positions: as military leaders, religious scholars, and the bureaucracy. The devshirme was the pipeline into those positions, a rather unsavoury practice that conscripted Christian youths into civil positions.
Far from being an opportunity for advancement, the devshirme ensured that all the power remained in the emperor’s hands. It barred the possibility of hereditary nobility.
Trade, Cities, And Culture During the Ottoman Empire
Capturing Constantinople was essential for its strategic value, particularly its position on the Bosporus that connected it to major waterways. Once in the Ottoman’s control, shipping and trade became a natural wealth grower.
Besides immediate access to water, the Ottoman Empire had access to the Silk Roads, the Indian Ocean, and Trans-Saharan transport routes.
With connections to Europe, Asia, and Africa, trade became the engine of economic growth. Those established trails doubled as pilgrimage routes, with major cities like Damascus, Cairo, and Salonica becoming target destination centres.
Traffic wasn’t limited to pilgrimage and commerce. Intellectual property flowed along those routes, too, enriching societies academically along the way. However, the Eastern Mediterranean region remained the most important centre of intellectual and commercial activity.
Why Did the Ottoman Empire Fall?
Unlike the end of the Qing Dynasty, the Ottoman Empire did not fall when its great leader died. Instead, it went into a slow, gradual decline. Changes in military strategy and technology, society, and commerce happened all the time.
After SĂĽleyman the Magnificent passed on, decision-making in those matters were much more fractious. Military experts argued over strategy, which led to battles being lost. Provincial authorities contested centralised authority, deploying gambits to secure more power for themselves.
The Empire never produced the resources it needed. After a conquest, it took the resources from the new land and moved on, rather than investing for the long term.
Taxation and succession became less clear, with much infighting over revenues due and who should lead the empire. These stresses began affecting relationships with partners and foes alike. European powers noted these disturbances, and began to plan for a takeover.
Reform and Growing International Pressure
Two centuries of slippage since Suleiman the Magnificent’s death in 1566 left the Ottoman Empire in a rather precarious state. Various leaders initiated actions to restore power and prestige but the entire imperial structure needed an overhaul.
But restoring the centralised authority proved challenging, so modernisation became the strategy. Going into the 19th century, Ottoman rulers launched the Tanzimat Reforms. The Edict of Gülhane (1839) was their first step.
Despite all this, the Ottoman empire continued its slow downward slide. Internal competition did as much to weaken imperial structures as did wars with Russia and conflicts in the Balkans. European powers intervened too, lending capital when needed, which drove the empire into a sovereign debt crisis and eventual bankruptcy (in 1875).
The First World War, Gallipoli, and the End of Empire
When an empire is bankrupt, it has to do extraordinary things to try and save itself. That is the primary reason why the Ottoman Empire entered into the First World War6. Ottoman troops fought alongside the Central Powers - Germany, Bulgaria, and Austria-Hungary.
The Gallipoli Peninsula had long been an Ottoman stronghold. During the war, they defended it on the advice of the German General Otto Liman von Sanders, who must have seen it as a point of entry for Allied troops.
Ottoman troops successfully defended the peninsula, thus preserving their territorial integrity from the Allies.
You likely learnt in that Australian and New Zealand forces landed on Gallipoli on 25 April 1915 in your history courses. They were a part of the British-led campaign against the Ottomans and Central Powers. Ottoman forces repelled the advance, causing Allied forces to give up the campaign. But not before suffering severe casualties.
The Ottoman Empire ceased to exist at the end of the First World War. In the wall's aftermath, The British Empire and the French divided most of what was previously Ottoman land between them.
References
- OpenStax . “17.2: The Ottomans and the Mongols.” Humanities LibreTexts, 23 June 2023, https://human.libretexts.org/Bookshelves/History/World_History/World_History_1%3A_to_1500_(OpenStax)/Unit_4%3A_A_Global_Middle_Ages_12001500_CE/17%3A_The_Ottomans_the_Mamluks_and_the_Ming/17.02%3A_The_Ottomans_and_the_Mongols. Accessed 26 Aug. 2026.
- Hudson, Myles. “Fall of Constantinople.” Encyclopædia Britannica, 22 May 2018, https://www.britannica.com/event/Fall-of-Constantinople-1453. Accessed 26 Aug. 2026.
- Byron, Cannon. “Süleyman the Magnificent | Research Starters | EBSCO Research.” Ebsco, 2022, https://www.ebsco.com/research-starters/biography/suleyman-magnificent. Accessed 26 Aug. 2026.
- Time Maps. “The Ottoman Empire: Imperial Greatness and Decline.” TimeMaps, 2026, https://timemaps.com/civilizations/ottoman-empire/. Accessed 26 Aug. 2026.
- ARI, B. (2021). The Politics of the Ottoman Empire In the 19th Century: Institutionalization, Change and Continuity. https://doi.org/10.26650/B/AA09.2021.007.01. Accessed 26 Aug. 2026.
- Yasamee, Feroze. “War Aims and War Aims Discussions (Ottoman Empire) / 1.0 / Handbook - 1914-1918-Online (WW1) Encyclopedia.” 1914-1918-Online (WW1) Encyclopedia, 9 July 2024, https://encyclopedia.1914-1918-online.net/article/war-aims-and-war-aims-discussions-ottoman-empire/. Accessed 26 Aug. 2026.
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