The Suez Canal opened in 1869 after a concession was granted to the company headed by Ferdinand de Lesseps. The project shortened the sea route between Europe and the Indian Ocean, but placed Egypt within an unequal financial structure. The state bore high costs, provided land and labor, and became dependent on foreign creditors and contracts that limited revenue.

When Khedive Ismail sold the Egyptian stake in 1875, the British government became a decisive shareholder. The occupation of 1882 transformed the canal zone into a central piece of imperial defense, links with India, and oil transport. The company retained an international form, although effective management remained concentrated on European interests with military protection.

The Convention of Constantinople, signed in 1888, established freedom of passage in times of peace and war. This obligation regulated the use of the waterway, but did not place the company above Egyptian sovereignty. The distinction became central in 1956: keeping navigation open did not mean accepting that foreign capital would retain ownership and revenue from the national infrastructure.

After the 1952 revolution, withdrawing foreign troops became a priority for the new regime. The Anglo-Egyptian agreement of 1954 stipulated the evacuation of the base, and the last British forces left the area in June 1956. The military withdrawal, however, did not dissolve the company nor did it hand over the tolls, technical staff, and effective commercial management to Cairo.

Nasser explored the gap between the national flag and economic power. Egypt exercised authority over the territory, but an infrastructure built on its soil remained subordinate to shareholders and administrators.

Nationalizing meant collecting revenues, directing operations, and proving that independence could be achieved through the mechanisms inherited from the empire, without abandoning the international obligation to maintain the passage.

On July 19, 1956, the US withdrew its offer of financial support for the Aswan Dam, a central project for electrification, irrigation, and Egyptian development. London followed suit, and the World Bank did not proceed. Nasser responded a week later, presenting the revenues from the Suez Canal as a source to finance the public works project.

The announcement took place in Alexandria on the fourth anniversary of King Farouk's abdication. During his speech, Nasser repeated the name Ferdinand de Lesseps, the code word that authorized the teams led by Mahmoud Younis to occupy facilities and documents. The plan sought to prevent administrative sabotage and link the legal change to an immediate physical presence on Egyptian soil.

The law nationalized the Universal Company of the Suez Canal, dissolved its governing bodies, and transferred its assets, rights, and obligations to the State. It also created an autonomous public authority to administer the waterway. Shareholders would receive compensation based on the price of their shares on the Paris Stock Exchange the day before the decree, without this constituting confiscation.

In the following weeks, London and Paris expected that the lack of technicians would make Egyptian management unfeasible. The former company facilitated the departure of numerous foreign pilots in September and created the risk of disruption. Egyptian pilots, supported by professionals from friendly countries, kept the convoys running and proved that the national administration could ensure the regular passage of ships.

The operational test gave economic substance to the discourse of sovereignty. Egypt needed to legally own the canal and also to collect tolls, manage traffic, maintain the equipment, and respond to users.

By preserving pre-war navigation, the Government weakened the claim of insecurity and demonstrated a technical capability that supported the national political decision taken.

The United Kingdom and France froze Egyptian assets, mobilized forces, and convened a conference in London. The reaction combined economic fears, loss of prestige, and hostility towards Nasser. For London, the Suez Canal sustained trade and energy links; for Paris, the crisis extended to the Algerian War, whose liberation movement received Egyptian support.

European governments argued that the waterway had an international character and that freedom of navigation could not depend on a single national authority. Egypt responded that the 1888 convention would remain valid and that nationalizing the company was a sovereign prerogative. For Cairo, managing a company never meant closing an open international maritime passage.

The first London conference brought together user countries and produced a proposal for international oversight. A mission headed by Australian Prime Minister Robert Menzies took the plan to Cairo, but Nasser rejected any formula that would remove effective control from Egypt.

India and other Afro-Asian states sought to reconcile free passage with the unequivocal recognition of full Egyptian sovereignty. Washington tried to prevent a war that could bring Egypt closer to the Soviet Union and weaken the Western position in the decolonized world.

Secretary of State John Foster Dulles proposed a users' association, but the mechanism failed to gain consensus. In October, the Security Council accepted principles on navigation and negotiation, without resolving the ultimate operational authority.

Diplomacy revealed that the issue went beyond tolls and contracts. The question at stake was whether former powers could impose external administration when a post-colonial state applied legal instruments to assets located within its territory. By negotiating without returning the company, Nasser transformed the canal into a concrete test of the sovereign equality enshrined in the Charter of the United Nations.

The July nationalization did not declare war. The invasion began on October 29, when Israeli forces entered the Sinai Peninsula. Israel sought to break the Egyptian blockade of the Straits of Tiran, reduce cross-border attacks, and undermine Nasser's military power. The operation also served the secret plan agreed upon with London and Paris to intervene in the Suez Canal.

According to the Sèvres agreement, Israel would advance towards the canal. The United Kingdom and France would then demand that both sides retreat, knowing that Egypt would refuse to abandon positions within its territory. This refusal would provide the pretext for the bombings and landings presented as an action intended to separate combatants and protect international shipping.

The Anglo-French ultimatum arrived on October 30th, and the air strikes began the following day. British and French troops landed at Port Said in November. The stated objective was to secure the canal, but the collusion with Israel aimed to regain European influence, occupy the area, and weaken or overthrow Nasser's government in the newly established sovereign Egypt.

The war affected Egyptian civilians and infrastructure, especially in Port Said, and disrupted navigation after ships sank in the canal. Bombardments, urban combat, displacement, and material losses fell upon populations unaffected by military decisions.

The blockade of the route further increased maritime costs and disrupted European energy supplies for weeks. The three allies shared the operation, but pursued different interests. Israel sought security, border, and navigation advantages; France wanted to stop a leader who supported the Algerian insurgency; the United Kingdom aimed to restore imperial authority and secure the route.

The convergence explained the joint offensive, without erasing individual responsibilities or legitimizing the use of foreign force.

The operation advanced militarily, but lost diplomatic support. The US, unaware of the collusion, condemned the invasion and refused to cover the allies' financial costs.

The Soviet Union threatened severe consequences as it crushed the Hungarian uprising and used Suez to denounce Western colonialism and expand its influence in the Middle East and emerging decolonized Africa. In the Security Council, British and French vetoes blocked decisions against the offensive.

The General Assembly then convened an extraordinary emergency session, called for a ceasefire and withdrawal, and authorized the first United Nations Emergency Force. This mechanism would oversee the end of hostilities and help to separate forces in militarily occupied Egyptian territory.

Financial pressure was decisive for London. The pound was suffering from capital flight and a loss of reserves, and the British government needed external assistance. Washington refused to support the venture and linked economic cooperation to retreat. France, dependent on British participation in the operation, lacked the political and logistical conditions to proceed alone against Egypt.

The United Kingdom and France accepted the ceasefire and withdrew their forces from the Suez Canal zone by December. Israel prolonged its occupation of parts of Sinai and Gaza, but completed its withdrawal in March 1957. United Nations forces remained between the Egyptians and Israelis, and the waterway reopened under the exclusive administration of sovereign Cairo.

The result was paradoxical. Egypt suffered military damage and did not single-handedly defeat the invaders, but it preserved its national identity and saw the attackers withdraw without restoring the company. Nasser emerged politically strengthened, and the crisis exposed the limits of British and French power. The victory consisted in the survival of a sovereign decision in the face of a superior, organized external military force.

In 1956, much of Africa remained under colonial rule. Sudan, Morocco, and Tunisia had gained independence that year, but most sub-Saharan territories were still awaiting liberation.

The Egyptian challenge demonstrated that a European power could be confronted through ownership, economic management, and diplomatic mobilization, in addition to direct popular resistance. African activists followed the crisis as proof of the shift in the balance of power.

Kenyan Oginga Odinga would write that Africa was never the same after Suez. The movements saw in the outcome the possibility of combining international diplomacy, popular mobilization, Afro-Asian networks, and support between states against empires still established on the continent.

In the following years, Cairo became a meeting point for Afro-Asian liberation and solidarity organizations. The 1957 conference brought together delegates subject to colonial surveillance and restrictions. Nasser's prestige opened political channels, grants, radio broadcasts, and contacts, although Egyptian support varied according to regional interests and Cold War calculations.

At the founding summit of the Organization of African Unity in 1963, Nasser presented Suez as a victory for freedom and a symbol of emancipation for the peoples of the continent. The memory had already transcended the Egyptian episode. It served to discuss apartheid, colonial occupation, boycotts, and the exploitation of raw materials, and linked political independence to African collective instruments.

The legacy does not transform Nasser into a model without contradictions. His regime was authoritarian, and the Egyptian project sought regional leadership. The Suez Canal did not eliminate external dependencies nor guarantee good management of African resources.

It demonstrated something more limited: control of strategic infrastructure could alter the revenues, negotiations, and diplomatic leverage of independent African states.

Seventy years later, the nationalization of the Suez Canal retains its strength because it brought together three dimensions of sovereignty: legal decision, administrative capacity, and resistance to external coercion.

Nasser did not win a conventional war against three states. He preserved, with international diplomatic support and the withdrawal of invaders, the July Act, which had placed strategic infrastructure under Egyptian authority and maintained navigation as an international obligation assumed by Cairo.

For Africa, the greater significance lies not in an automatic recipe for nationalizations nor in an uncritical celebration of Nasserism. It lies in the understanding that the flag, the anthem, and a seat at the United Nations are not enough when the revenue, logistics, and essential decisions remain beyond national reach.

The Suez Canal made this distance visible and showed that reducing it could change the position of an African state vis-à-vis the more organized external powers.