Question: During what war were the Russia-United Kingdom relations in a state of rivalry after the abdication of Emperor Nicholas II? 

<P0-S0> The Russia–United Kingdom relations (Russian: Российско-британские отношения ) is the relationship between the Russian Federation and the United Kingdom of Great Britain and Northern Ireland and it's overseas territories. <P0-S1>  Spanning nearly five centuries, it has often switched from a state of alliance to rivalry or even war. <P0-S2>  They were allies again in World Wars I and II, although relations were strained by the Russian Revolution of 1917. <P0-S3>  The Russians and British were allies against Napoleon, and enemies in the Crimean War of the 1850s, and rivals in the Great Game for control of central Asia in the late 19th century. <P0-S4>  They were at sword's point during the Cold War (1947–91). <P0-S5>  Russian big businesses had strong connections with the City of London and British corporations during the late 1990s and 2000s. <SEP> <P1-S0>  The Russian Empire collapsed with the abdication of Emperor Nicholas II and the old regime was replaced by a provisional government during the first revolution of February 1917 (March in the Gregorian calendar; the older Julian calendar was in use in Russia at the time). <P1-S1> The Russian Revolution was a pair of revolutions in Russia in 1917 which dismantled the Tsarist autocracy and led to the rise of the Soviet Union. <P1-S2>  Alongside it arose grassroots community assemblies (called 'soviets') which contended for authority. <P1-S3>  In the second revolution that October, the Provisional Government was toppled and all power was given to the soviets. <SEP> <P2-S0> The October Manifesto (Russian: Октябрьский манифест, Манифест 17 октября ), officially The Manifesto on the Improvement of the State Order (Манифест об усовершенствовании государственного порядка), is a document that served as a precursor to the Russian Empire's first constitution, which would be adopted the next year. <P2-S1>  The Manifesto was issued by Emperor Nicholas II, under the influence of Sergei Witte, on 30 October [O.S. 17 October] 1905 as a response to the Russian Revolution of 1905. <P2-S2>  Nicholas strenuously resisted these ideas, but gave in after his first choice to head a military dictatorship, Grand Duke Nicholas, threatened to shoot himself in the head if the Tsar did not accept Witte's suggestion. <P2-S3>  Nicholas reluctantly agreed, and issued what became known as the October Manifesto, promising basic civil rights and an elected parliament called the Duma, without whose approval no laws were to be enacted in Russia in the future. <P2-S4>  According to his memoirs Witte did not force the Tsar to sign the October Manifesto, which was proclaimed in all the churches. <SEP> <P3-S0> Charles Sydney Gibbes (19 January 1876 – 24 March 1963) was a British academic who from 1908 to 1917 served as the English tutor to the children of Emperor Nicholas II of Russia. <P3-S1>  When Nicholas abdicated the throne in March 1917 Gibbes voluntarily accompanied the Imperial family into exile to the Siberian village of Tobolsk. <P3-S2>  After the family was murdered in 1918 Gibbes returned to the United Kingdom and eventually became an Orthodox monk, adopting the name of "Nicholas" in commemoration of Nicholas II. <P3-S3>  He died in 1963, and is buried at Headington cemetery, Oxford, Oxfordshire, England.