To the west, the Union gained control of the Mississippi River after the Battle of Shiloh ( April 1862 ) and Siege of Vicksburg, splitting the Confederacy in two and destroying much of their western army.

* 1863 – American Civil War: The Siege of Vicksburg – ships led by Union Admiral David Dixon Porter move through heavy Confederate artillery fire on approach to Vicksburg, Mississippi.

* 1863 – American Civil War: Siege of Vicksburg – Vicksburg, Mississippi surrenders to Ulysses S. Grant after 47 days of siege.

* 1863 – American Civil War: The Siege of Vicksburg begins.

* May 14 – American Civil War – Battle of Jackson ( MS ): Union General Ulysses S. Grant defeats Confederate General Joseph E. Johnston, opening the way for the Siege of Vicksburg.

* May 18 – American Civil War: The Siege of Vicksburg begins ( ends Saturday, July 4, when 30, 189 Confederate men surrender ).

* May 26 – American Civil War – The Siege of Vicksburg starts.

** The Siege of Vicksburg, an American Civil War battle

The valiant Oregon County men suffered heavy losses to disease and battle casualties and finally surrendered with 30, 000 other Confederates at the Siege of Vicksburg on July 4, 1863.

* Clinton Lycurgus Armstrong, ( b. 1844 ) Medal of Honor recipient for the Siege of Vicksburg during the American Civil War

Played major role in Battle of Champion Hill during the Siege of Vicksburg.

During the American Civil War, the city finally had to surrender during the Siege of Vicksburg, after which the Union Army gained control of the entire Mississippi River.

Subjects for the murals were drawn from the history of Vicksburg and the surrounding area and include President Theodore Roosevelt's bear hunt, the SS Sultana, the Sprague, the Siege of Vicksburg, the Kings Crossing site, Willie Dixon, the Flood of 1927, the 1953 Vicksburg, Mississippi tornado outbreak, Rosa A. Temple High School and the Vicksburg National Military Park.

During the Siege of Vicksburg, in 1863, Union troops led by General Ulysses S. Grant tunnelled under the Confederate trenches and detonated the mine beneath the 3rd Louisiana Redan on June 25, 1863.

Two attempts to carry the works by storm during the Siege of Port Hudson, as at Vicksburg, were dismal failures.

* 1863-The Siege of Vicksburg ends

The Siege of Vicksburg ( May 18 – July 4, 1863 ) was the final major military action in the Vicksburg Campaign of the American Civil War.

* Under Siege was aired on 20 May 1993

The Ottomans invaded in 1565, undertaking the Great Siege of Malta, which began on May 18 and lasted until September 8, and is portrayed vividly in the frescoes of Matteo Perez d ' Aleccio in the Hall of St. Michael and St. George.

Delegation of German officers walking for negotiations before capitulation ( surrender ) | capitulation of Siege of Breslau | Festung Breslau, 6 May 1945

* December 27 – Siege of Bilbao-Third Carlist War -( 27 December 1873-2 May 1874 )- Campaigning in Navarre, Pretender Don Carlos VII and General Joaquín Elío besiege Bilbao, held by General Ignacio del Castillo and 1, 200 men.

* May 2 – Siege of Bilbao ( Third Carlist War ): The siege is lifted

* May – The New Model Army is decimated at the Siege of Clonmel.

* April 2 – May 29 – Siege and Fall of Constantinople ( now Istanbul ): The Ottoman Sultan Mehmet II the Conqueror ends the Roman Empire by capturing the capital, Constantinople.

* May 18 – Ottoman troops land on the island of Malta, beginning The Great Siege of Malta.

* September 11 – The Knights of Malta lift the Turkish Siege of Malta ( started on May 18 ).

* May 21 – Siege of Acre ends after two months: Napoleon's attempt to widen his Middle Eastern campaign into Syria is frustrated by Ottoman forces, and he withdraws to Egypt.

* 1268 – May 18 – The Principality of Antioch, a crusader state, falls to Baibars after the Siege of Antioch ; Baibars ' destruction of the city of Antioch was so great as to permanently negate the city's importance.

* March 21 – May 2 – Hundred Years ' War: Siege of Meaux: Meaux surrenders to the English.

* May 14 – The French first attempt to relieve the Siege of Compiègne.

* May 14 – Second Siege of Sfetigrad ( 1449 ): Garrison surrenders and Ottomans seize the fortress.

* May 18 – Al-Ashraf Khalil of Egypt captures Acre, thus exterminating the Crusader Kingdom of Jerusalem ( the final Christian landholding remaining from the Crusades ), and ending the Ninth Crusade and effectively all Crusades, by eliminating the possibility of further attacks on the Holy Land ( see Siege of Acre ( 1291 )).

The Siege of Mafeking lasted 217 days from October 1899 to May 1900, and turned Robert Baden-Powell into a national hero.

** April – May – Siege and repulse from Gergovia.

The town was virtually razed to the ground during World War II, when in May 1940, it was a strategic bombing target of the invading German forces who took the town during the Siege of Calais.

In May 1940, it was a key objective of the invading German forces and became the scene of a last-ditch defence — the Siege of Calais — which diverted a sizable amount of German forces for several days immediately prior to the Battle of Dunkirk.

Residents ' devotion to the cause during the War of 1812 led to the formation of the Petersburg Volunteers — who distinguished themselves in action at the Siege of Fort Meigs on May 5, 1813.

At the Siege of Rouen ( May – October 1562 ), the crown regained the city, but Antoine de Navarre died of his wounds.

During the Siege of Paris on 18 January 1871, King Wilhelm I of Prussia was proclaimed German Emperor in the Hall of Mirrors at the Palace of Versailles.

During the Siege of Paris, the German princes assembled in the Hall of Mirrors of the Palace of Versailles and proclaimed the Prussian King Wilhelm I as the " German Emperor " on 18 January 1871.

During the Siege of Paris on 18 January 1871, King Wilhelm I of Prussia was proclaimed German Emperor in the Hall of Mirrors at the Palace of Versailles.

He was put to work in the Siege of Sevastopol and took part in the assault of the Redan from 18 June to 8 September.

The Siege of Belfort, between 3 November 1870 and 18 February 1871, was successfully resisted until the garrison was ordered to surrender 21 days after the armistice between France and Prussia.

The allies suffered a major setback on 18 July when the long Siege of Gaeta ended.

* Siege of Jerusalem from 17 May to 18 July 1948.

On 18 November 1941, Operation Crusader was launched to lift the Siege of Tobruk ( the third such attack ), under the command of General Alan Cunningham and the New Zealand 2nd Division ( integrated into the British Eighth Army ) took part in the offensive, crossing the Libyan frontier into Cyrenaica.

* 18 January, Siege of Dartmouth ended with the surrender of Royalist garrison.

The Siege of Derry () lasted from 18 April to 28 July 1689, during the Williamite War in Ireland.

He first marched on Dublin, where he was well received and, with a Jacobite army of Catholics, Protestant Royalists and French, then marched north, joining the Siege of Derry on 18 April.

During the Siege of Boston on August 1, 1775, a tall liberty pole was erected on Prospect Hill, a fortified high-ground overlooking the road to British-occupied Boston .< ref > Journal kept by continental soldier Lieutenant Paul Lunt, May-December 1775 < i >" raised the mast that came out of the schnoner that was burnt at Chelsea, for to hoist our flag upon, in the fort upon Prospect Hill ".</ ref > Both the < i >" Appeal to Heaven "</ i > Pine Tree Flag and Grand Union Flag ( aka Continental Colors ) are reported to have flown on Prospect Hill .< ref > Paul Lunt's Diary, Lieutenant Paul Lunt, May-December 1775, Tuesday, July 18, 1775, < i >" Our standard was presented in the midst of the regiments with this inscription upon it, " Appeal to Heaven.

On 18 June 1855, Knox volunteered for the ladder party in the attack on the Redan, an attempt to finish the Siege of Sevastopol, he was struck by a Russian cannon ball, removing part of his left arm.

Spanish forces took part in the Siege of Toulon, which lasted from 18 September to 18 December 1793.

On 18 June 1855 during the Siege of Sevastopol, Sapper Perie showed conspicuous gallantry, with a lieutenant ( Gerald Graham ) in leading a ladder party at the assault on the Redan.

* Review of Siege by Dominic Hampshire in The Scorpion, issue 18