Proclaimed emperor in 193 by his legionaries in Noricum during the political unrest that followed the death of Commodus, he secured sole rule over the empire in 197 after defeating his last rival, Clodius Albinus, at the Battle of Lugdunum. In securing his position as emperor, he founded the Severan dynasty.
This move was considered controversial in New Granada and was one of the reasons for the deliberations, which met from 9 April to 10 June 1828. The convention almost ended up drafting a document which would have implemented a radically federalist form of government, which would have greatly reduced the powers of a central administration. The federalist faction was able to command a majority for the draft of a new constitution which has definite federal characteristics despite its ostensibly centralist outline. Unhappy with what would be the ensuing result, pro-Bolívar delegates withdrew from the convention, leaving it moribund.
The Union of Bessarabia with Romania was signed on 9 April 1918. The unification act that brought these lands within the modern Romanian state was not recognized by Bolshevik Soviet Russia, but it was occupied with fighting the White movement, Poland and the Ukraine in its war for independence, and resources were not available to challenge Romania.
On 9 April, German forces invaded Denmark and Norway. On the same day Hitler proclaimed the birth of the Greater Germanic Reich, his vision of a united empire of Germanic nations of Europe in which the Dutch, Flemish, and Scandinavians were joined into a "racially pure" polity under German leadership.
In April 1947, de Gaulle made a renewed attempt to transform the political scene by creating a Rassemblement du Peuple Français (Rally of the French People, or RPF), which he hoped would be able to move above the familiar party squabbles of the parliamentary system.
In 1948 the assassination of populist Jorge Eliécer Gaitán radically stirred up the armed conflict. It led to the Bogotazo, an urban riot killing more than 4,000 people, and subsequently to ten years of sustained rural warfare between members of Colombian Liberal Party and the Colombian Conservative Party, a period known as La Violencia ("The Violence"), which took the lives of more than 200,000 people throughout the countryside.
On April 9, 1953, Giáp, after having failed repeatedly in direct attacks on French positions in Vietnam, changed strategy and began to pressure the French by invading Laos, surrounding and defeating several French outposts such as Muong Khoua.
On 9 April 1961, Brigade 2506 personnel, ships, and aircraft started transferring from Guatemala to Puerto Cabezas. Curtiss C-46s were also used for transport between Retalhuleu and a CIA base (code-named JMTide, aka Happy Valley) at Puerto Cabezas.
Liverpool and Nottingham Forest met in the semi-final at Hillsborough in 1988, and fans reported crushing at the Leppings Lane end. Liverpool lodged a complaint before the match in 1989. One supporter wrote to the Football Association and Minister for Sport complaining, "The whole area was packed solid to the point where it was impossible to move and where I, and others around me, felt considerable concern for personal safety".
On April 9, 1989, troops attacked the demonstrators; some 20 people were killed and more than 200 wounded. This event radicalized Georgian politics, prompting many to conclude that independence was preferable to continued Soviet rule.
In the 1992 general election May stood unsuccessfully for the safe Labour seat of North West Durham, placing second to incumbent MP Hilary Armstrong by 12,747 votes (27.6%) to 26,734 (57.8%), with future Liberal Democrat leader Tim Farron placing third.
Thatcher returned to the backbenches as a constituency parliamentarian after leaving the premiership. Aged 66, she retired from the House at the 1992 general election, saying that leaving the Commons would allow her more freedom to speak her mind.
On April 9, James Earl Salisbury died of SARS at a hospital in Hong Kong. An American Mormon and a teacher at Shenzhen Polytechnic. He had been sick for approximately one month before his death, but he was originally diagnosed with pneumonia. His son Michael "Mickey" Salisbury was with him in China and also contracted the disease, but he survived it. Salisbury's death led to more open admissions by the Chinese government about the spread of SARS.
The marriage Charles and Camilla Parker was scheduled to take place in a civil ceremony at Windsor Castle, with a subsequent religious blessing at St George's Chapel. The venue was subsequently changed to Windsor Guildhall, because a civil marriage at Windsor Castle would oblige the venue to be available to anyone who wished to be married there. Four days before the wedding, it was postponed from the originally scheduled date of 8 April until the following day in order to allow Charles and some of the invited dignitaries to attend the funeral of Pope John Paul II.
Operating under a new electoral law written unilaterally by the governing parties with strong criticism from the parliamentary opposition, the April 2006 general election was held. The results of this election handed Romano Prodi's centre-left coalition, known as The Union, (Berlusconi's opposition) a very thin majority: 49.8% against 49.7% for the centre-right coalition House of Freedoms in the Lower House, and a two-senator lead in the Senate (158 senators for The Union and 156 for the House of Freedoms).
Philip died on the morning of 9 April 2021 at Windsor Castle, aged 99, two months before his 100th birthday. He was the longest-serving royal consort in British history. In private, the Queen described her husband's death as "having left a huge void in her life".