Expansion of the
Ottoman Empire
Guiding Question:
How did the Ottoman Empire reach its vast extents?
The Ottomans Contextualized
Place and Time
13th Century Anatolia
By the 13th century, Anatolia had become
politically fragmented, ruled by a number
of small Beyliks that were notionally loyal
to the Mongols through the Sultanate of
Rum. Traditional guarantors of stability in
the region—the Byzantine Empire and
the Seljuk Turks—had been rocked by
the twin shocks of the Crusades and
Mongol invasions. It was within this
power vacuum that the Beylik of Osman
would rise to become the Ottoman
Empire.
Memories of Manzikert:
Turkish Anatolia
Following the defeat of the Byzantine Empire at the Battle of
Manzikurt in 1071, the Anatolian peninsula increasingly became
Turkish in ethnic composition. Through successive waves of
migration, the region had transformed into a predominantly
Turkish and Islamic area by the 12th century.
The Byzantine Empire never fully recovered from the disaster at
Manzikurt. Despite a brief resurgence of power under the
Komnenian dynasty and attempts at cooperation with Western
Europe, the Empire ultimately collapsed again following the Sack
of Constantinople in 1204 by Venetian crusaders.
Fragmentation Complete
The Battle of Köse Dağ in 1243 marked the
collapse of Seljuk rule in Anatolia, leading to the
complete fragmentation of the region. With the
political landscape left in a vacuum, the Anatolian
peninsula became ripe for change. Now, all it
would take is one state with enough coordination
and luck to consolidate power and unify the
region.
Osman I – Origins of the Ottoman Empire
Not much is known about the first Sultan of the
Ottoman Empire, Osman I, as his life is shrouded
in mystery. However, his significance in the creation
of what would become the greatest empire in the
Eastern Mediterranean since the Romans is clear.
During his lifetime, he transformed anonymous
Anatolian Beylik into an independent state with the
military might to rival what remained of the
Byzantine
Empire.
Osman – Key Points
• Inheritance: Osman I inherited a small Beylik that was notionally subject to the
Sultanate of Rum. Through his leadership, he successfully obtained independence
for his people, became a Sultan in his own right, and began the Ottoman Empire.
• Exploitation of Power Structures: Osman skillfully navigated the fragmented
power structure of Anatolia, utilizing both military and diplomatic means to
strengthen his position and expand his influence.
• Capture of Bursa: In 1326, Osman managed to capture Bursa from the
Byzantines. This significant victory effectively stopped the Byzantine Empire from
exercising political authority in Anatolia, paving the way for further Ottoman
expansion.
Why was he successful?
• Advantageous Geography: Osman ruled from a strategically located area on the western side of
Anatolia, which provided natural defenses. The hilly terrain made it easier to protect his territory from
external threats.
• Surrounded by Weak States: The region was characterized by a fragmented power structure, with many
weak states surrounding Osman’s principality. This lack of strong opposition allowed him to expand his
influence without facing significant resistance.
• Weak Sultanate of Rum: The Sultanate of Rum was in decline and very weak during Osman's rise. This
weakness compelled the Sultanate to recognize Osman as independent, allowing him to consolidate power
without interference from a stronger authority.
• Byzantine Empire's Vulnerability: The Byzantine Empire was also in a weakened state, unable to
secure allies in Western Europe, which had historically been a precondition for its strength. Additionally,
the Byzantines faced significant challenges in the Balkans, particularly from rising powers like Bulgaria
and Serbia. This further diminished their capacity to counter Osman's ambitions.
The Balkans
Southern Europe at the Edge of Asia
• Divided Region: The Balkans in the 14th century were
characterized by division among three key players: The
Byzantine Empire, Serbia, and Bulgaria. Each of these powers
was often in conflict with one another, fighting over land,
territory, and influence.
• Fragmented Power Structure: Similar to Anatolia, the Balkans
lacked a single, strong power. This fragmentation created an
environment of instability, making it easier for external forces to
exploit the situation.
• Ottoman Arrival: When the Ottomans arrived in the Balkans
around 1356, they were able to take advantage of the disunity
among these states. They systematically conquered each power in
turn, beginning a significant expansion into the region.
• Strategic Conquests: The Ottomans capitalized on the ongoing
conflicts and weaknesses of the local powers, allowing them to
establish a foothold in the Balkans and set the stage for further
territorial gains.
Ottoman Conquest of the Balkans
• Establishment of Power:
• By the mid-15th century, the Ottomans dominated the Balkans.
• They exploited local divisions and the absence of a single, dominant power.
• Key Victories: Significant battles, such as the Battle of Kosovo in 1389,
showcased Ottoman military prowess and solidified their presence in the region.
This battle was pivotal as it demonstrated the Ottomans' capability to defeat major
Christian forces, signaling their intention to become a dominant power in Europe
• Cultural and Religious Policies: The Ottomans employed a relatively tolerant
approach towards the diverse religious groups in the Balkans, allowing them to
incorporate new territory quickly.
European Response
The rise of the Ottoman Empire posed a significant threat to Christian Europe, as it
represented an Islamic empire on their doorstep. This expansion rekindled
memories of previous Islamic conquests, such as those by the Umayyad and Abbasid
caliphates, which had once swept through parts of Europe, including the Iberian
Peninsula. The fear of losing territory and influence to a powerful Islamic state fueled
anxiety among European leaders and populations.
The Ottomans' advance into the Balkans was seen as a direct challenge to
Christendom, prompting a sense of urgency among European powers to respond. The
historical context of earlier conflicts and the desire to protect their territories and faith
motivated the crusade efforts, despite their eventual failure.
Varna Crusade: 1440s
Definition of Crusade: A crusade is a military expedition aimed at reclaiming territory for
Christianity, often associated with the medieval Crusades that sought to secure control over
holy sites in the Middle East.
• Crusade Against the Ottomans: In the 1440s, Christian Europe launched a crusade
against the Ottomans, motivated by the growing concern over the expansion of Islamic
power in Europe.
Reasons for Crusade Failure
• Lack of Unity: The response from Christian states was fragmented, preventing a
coordinated effort against the Ottomans.
• Internal Conflicts: Rivalries among local powers hindered the formation of a unified
front, weakening their collective military strength.
• Military Disadvantages: The Ottomans possessed superior military strategies and
resources, making
Constantinople
Significance:
• Last Christian Outpost: It was the final stronghold of
Christianity in the Balkans and a symbol of Christian resistance
against the Ottomans.
• Civilization vs. Barbarism: Europeans viewed Constantinople
as a bastion of civilization against what they perceived as the
'barbarism' of the 'Turk'.
• Symbol of the Roman Empire: As the last remnant of the
Roman Empire, capturing it would enhance the prestige of the
Ottomans.
Strategic Location:
• The city was situated at the intersection of Europe and Asia
and between the Black Sea and the Mediterranean.
• Control of Constantinople meant dominance over a significant
portion of world trade.
Walls and Great Chain of the Golden Horn
Walls of Constantinople
• Formidable defensive system with multiple layers
and towers.
• Renowned for their strength and complexity.
• Made Constantinople one of the most fortified cities
of its time.
Great Chain of the Golden Horn
• A massive chain stretched across the entrance of the
Golden Horn (an estuary north of the city).
• Served as a barrier against enemy ships, preventing
naval access.
Mehmet II prepares to take Constantinople
By the mid-15th century, after the failure of the Varna
Crusade and with the Balkans under Ottoman control,
Sultan Mehmet II prepared for the final assault on
Constantinople. He faced two main challenges: the
city's massive walls and its location surrounded by deep
waters. To overcome these issues, he used massive
cannons and deployed his navy into the Golden Horn
while organizing his army for the siege, which began on
April 6, 1453, and lasted for 55 days.
Siege Cannon (Grand Bombard)
Urban, also known as Orban, was an iron engineer from
Transylvania who designed one of the largest siege
cannons in premodern history for the Ottoman siege of
Constantinople in 1453. This massive cannon, measuring
27 feet long with a bore of 30 inches, was
groundbreaking in its design and firepower. Its sheer size
and capability enabled Mehmet II's army to breach the
formidable walls of Constantinople, allowing them to
penetrate the city's defenses. Without this huge and
innovative artillery piece, the Ottomans would likely not
have achieved success in their assault on the city.
Ottomans and the Middle East
• Following the Fall of Constantinople on May 29, 1453,
the Ottoman Empire began to expand significantly in the
Middle East during the early 16th century.
• The Ottomans were victorious against local powers.
• Key conquests included the capture of the holiest sites in
Islam, such as Mecca in 1517 and Medina.
• As a result of these victories, the Ottoman Sultan declared
himself 'Caliph', positioning himself as the representative
of the world's Islamic community. This declaration not
enhanced the Ottoman's political and religious influence,
helping them to legitimize their power and control
newly won territories.
The Battle of Mohács (1526)
And The Ottomans at the Apex of Power
•Sultan Suleiman the Magnificent presided over the absolute
apex of Ottoman military might and ambition during the 16th
century.
•He led the Empire to a decisive victory over the Hungarians at
the Battle of Mohács in 1526, where the Ottoman superiority
in guns and cannons laid waste to local forces, showcasing the
effectiveness of the Ottoman military.
•Following this victory, Sultan Suleiman led a huge army to
Vienna, the heart of Habsburg Europe, the most powerful
Christian dynasty that Europe had seen in centuries.
Siege of Vienna (1529)
The High-Water Mark?
Suleiman’s campaign marked the high-water mark of the
Ottoman Empire. Taking Vienna would arguably have
been more significant than the earlier conquest of
Constantinople; while Constantinople served as a
symbolic power center, Vienna represented the actual
heart of 16th-century Europe. The fall of Vienna could
have shifted the balance of power in Europe, further
consolidating Ottoman dominance in the region.
Ultimately, the campaign was a failure, and Suleiman
ordered his forces back to Constantinople. Some
historians see this as the beginning of Ottoman decline.
Defeat at Vienna?
Why?
The Ottomans were defeated at Vienna due to a
unified defense put up by various European
powers, organized under the Habsburg Empire.
This coordination among European states was
critical.
The defenders of Vienna had access to advanced
weaponry, including muskets and cannons which
levelled the playing field against the Turkish.
Battle of Lepanto
• The Battle of Lepanto, a navel engagement,
occurred on October 7, 1571.
• The Ottomans were defeated by a unified Christian
fleet known as the Holy League.
• This battle marked a significant moment as the
Ottoman navy was destroyed, ending their
dominance at sea.
• The victory demonstrated that European powers could
effectively resist Ottoman expansion through
cooperation and advanced weaponry.