Question: When was "Slavs" used in the national anthem of the country whose military having the Air Defense Artillery was unprepared for the invasion of the country conquered by the Pact?

Context paragraphs:
paragraph_text: The 14.5×114mm (.57 Cal) is a heavy machine gun and anti-materiel rifle cartridge used by the Soviet Union, the former Warsaw Pact, modern Russia, and other countries.
title: 14.5×114mm
paragraph_text: The multi-national Communist armed forces' sole joint action was the Warsaw Pact invasion of Czechoslovakia in August 1968. All member countries, with the exception of the Socialist Republic of Romania and the People's Republic of Albania participated in the invasion.
title: Warsaw Pact
paragraph_text: The armed forces have three branches: Navy, Army and Air Force. They serve primarily as a self-defense force whose mission is to protect the territorial integrity of the country and provide humanitarian assistance and security at home and abroad. As of 2008, the three branches numbered 39,200 active personnel including 7,500 women. Portuguese military expenditure in 2009 was $5.2 billion, representing 2.1 percent of GDP. Military conscription was abolished in 2004. The minimum age for voluntary recruitment is 18 years.
title: Portugal
paragraph_text: ``My Country, 'Tis of Thee '', also known as`` America'', is an American patriotic song, whose lyrics were written by Samuel Francis Smith. The melody used is the same as that of the national anthem of the United Kingdom, ``God Save the Queen '', arranged by Thomas Arne. The song served as one of the de facto national anthems of the United States (along with songs like`` Hail, Columbia'') before the adoption of ``The Star - Spangled Banner ''as the official U.S. national anthem in 1931.
title: America (My Country, 'Tis of Thee)
paragraph_text: In contrast, the ROK Army defenders were relatively unprepared and ill-equipped. In South to the Naktong, North to the Yalu (1961), R.E. Appleman reports the ROK forces' low combat readiness as of 25 June 1950. The ROK Army had 98,000 soldiers (65,000 combat, 33,000 support), no tanks (they had been requested from the U.S. military, but requests were denied), and a 22-piece air force comprising 12 liaison-type and 10 AT6 advanced-trainer airplanes. There were no large foreign military garrisons in Korea at the time of the invasion, but there were large U.S. garrisons and air forces in Japan.
title: Korean War
paragraph_text: A major consideration was the possible Soviet reaction in the event that the US intervened. The Truman administration was fretful that a war in Korea was a diversionary assault that would escalate to a general war in Europe once the United States committed in Korea. At the same time, "[t]here was no suggestion from anyone that the United Nations or the United States could back away from [the conflict]". Yugoslavia–a possible Soviet target because of the Tito-Stalin Split—was vital to the defense of Italy and Greece, and the country was first on the list of the National Security Council's post-North Korea invasion list of "chief danger spots". Truman believed if aggression went unchecked a chain reaction would be initiated that would marginalize the United Nations and encourage Communist aggression elsewhere. The UN Security Council approved the use of force to help the South Koreans and the US immediately began using what air and naval forces that were in the area to that end. The Administration still refrained from committing on the ground because some advisers believed the North Koreans could be stopped by air and naval power alone.
title: Korean War
paragraph_text: Currently, the army is divided into the Regular Army, the Army Reserve, and the Army National Guard. The army is also divided into major branches such as Air Defense Artillery, Infantry, Aviation, Signal Corps, Corps of Engineers, and Armor. Before 1903 members of the National Guard were considered state soldiers unless federalized (i.e., activated) by the President. Since the Militia Act of 1903 all National Guard soldiers have held dual status: as National Guardsmen under the authority of the governor of their state or territory and, when activated, as a reserve of the U.S. Army under the authority of the President.
title: United States Army
paragraph_text: Iron Beam (, "") is an air defense system which is in development by Israeli defense contractor Rafael Advanced Defense Systems. Unveiled at the Singapore Air Show on February 11, 2014. The system is designed to destroy short-range rockets, artillery, and mortars with a range of up to , too small for the Iron Dome system to intercept effectively. In addition, the system could also intercept unmanned aerial vehicles. Iron Beam will use a "directed high energy laser beam" to destroy hostile targets with ranges of up to . Iron Beam will constitute the fifth element of Israel's integrated air defense system, in addition to Arrow 2, Arrow 3, David's Sling, and Iron Dome. However, Iron Beam is also a stand-alone system.
title: Iron Beam
paragraph_text: ``Flower of Scotland ''has been used since 1990 as Scotland's unofficial national anthem. It was written by Roy Williamson of The Corries in 1967, and adopted by the SRU to replace`` God Save the Queen''. In the first year of using ``Flower of Scotland ''as an anthem, Scotland walked onto the pitch at the beginning of the Five Nations Championship deciding match against England. This combination was explosive and Scotland went on to beat England 13 -- 7 and win the Five Nations Championship with a Grand Slam.
title: Scotland national rugby union team
paragraph_text: In 1968, Tito offered Czechoslovak leader Alexander Dubček to fly to Prague on three hours notice if Dubček needed help in facing down the Soviets. In April 1969, Tito removed generals Ivan Gošnjak and Rade Hamović in the aftermath of the invasion of Czechoslovakia due to the unpreparedness of the Yugoslav army to respond to a similar invasion of Yugoslavia.
title: Josip Broz Tito
paragraph_text: His opponents learned from Napoleon's innovations. The increased importance of artillery after 1807 stemmed from his creation of a highly mobile artillery force, the growth in artillery numbers, and changes in artillery practices. As a result of these factors, Napoleon, rather than relying on infantry to wear away the enemy's defenses, now could use massed artillery as a spearhead to pound a break in the enemy's line that was then exploited by supporting infantry and cavalry. McConachy rejects the alternative theory that growing reliance on artillery by the French army beginning in 1807 was an outgrowth of the declining quality of the French infantry and, later, France's inferiority in cavalry numbers. Weapons and other kinds of military technology remained largely static through the Revolutionary and Napoleonic eras, but 18th-century operational mobility underwent significant change.
title: Napoleon
paragraph_text: The Ministry of National Defense of the Republic of Ecuador is the ministry responsible for national defense and is responsible for controlling all three branches of the Military of Ecuador.
title: Ministry of National Defence (Ecuador)
paragraph_text: Iron Dome (, "") is a mobile all-weather air defense system developed by Rafael Advanced Defense Systems and Israel Aerospace Industries. The system is designed to intercept and destroy short-range rockets and artillery shells fired from distances of to away and whose trajectory would take them to an Israeli populated area. Israel hopes to increase the range of Iron Dome's interceptions, from the current maximum of to and make it more versatile so that it could intercept rockets coming from two directions simultaneously.
title: Iron Dome
paragraph_text: ``In Plenty and In Time of Need ''is the national anthem of the country of Barbados. It was written by Irving Burgie (1926 --) and was composed by C. Van Roland Edwards (1912 -- 1985). As one part of the West Indies Federation from 1958 -- 1962, Barbados' anthem was supposed to be Forged from the Love of Liberty (which is currently the national anthem of Trinidad and Tobago), however the current anthem was created with Barbados' moves toward full independence. This song was then adopted by Barbados when it became independent in 1966.
title: In Plenty and In Time of Need
paragraph_text: The word "Slavs" was used in the national anthem of the Slovak Republic (1939–1945), Yugoslavia (1943–1992) and the Federal Republic of Yugoslavia (1992–2003), later Serbia and Montenegro (2003–2006).
title: Slavs
paragraph_text: The Georgia State Defense Force (GSDF, GASDF, or SDF) is an unpaid, volunteer component of the Georgia Department of Defense, serving in support of the national and state constitutions under direction of the governor and the adjutant general of Georgia. As a State Defense Force, members serve alongside the Georgia Army National Guard and the Georgia Air National Guard.
title: Georgia State Defense Force
paragraph_text: Germany invaded Poland on 1 September 1939. Joseph Stalin waited until 17 September before launching his own invasion of Poland. Part of southeastern (Karelia) and the Salla region of Finland were annexed by the Soviet Union after the Winter War. This was followed by Soviet annexations of Estonia, Latvia, Lithuania, and parts of Romania (Bessarabia, Northern Bukovina and the Hertza region). It was only in 1989 that the Soviet Union admitted the existence of the secret protocol of the Nazi - Soviet pact regarding the planned divisions of these territories. The invasion of Bukovina violated the Molotov - Ribbentrop Pact, as it went beyond the Soviet sphere agreed with the Axis.
title: Soviet Union in World War II
paragraph_text: Jana Gana Mana is the national anthem of India. It is composed in Bengali by poet Rabindranath Tagore.. The composition consisting of the words and music of the first stanza of the late poet Rabindra Nath Tagore's song known as ``Jana Gana Mana ''is the National Anthem of India.
title: Jana Gana Mana
paragraph_text: Patrick S. Castagne composed the words and music of the National Anthem in 1962. Mr Castagne, a renowned West Indian songwriter, was employed at the Trinidad and Tobago Commission in London. One of his compositions, called ``A Song for the Islands ''or A Song for Federation, was submitted to the West Indies Federation as a possible anthem.
title: Forged from the Love of Liberty
paragraph_text: The Marseillaise was a revolutionary song, an anthem to freedom, a patriotic call to mobilize all the citizens and an exhortation to fight against tyranny and foreign invasion. The French National Convention adopted it as the Republic's anthem in 1795. The song acquired its nickname after being sung in Paris by volunteers from Marseille marching to the capital. The song is the first example of the ``European march ''anthemic style. The anthem's evocative melody and lyrics have led to its widespread use as a song of revolution and its incorporation into many pieces of classical and popular music.
title: La Marseillaise

Reasoning steps:
Which country did the Pact conquer? >>>> Czechoslovakia
The Air Defense Artillery is a branch of what? >>>> the Army
What the Army was unprepared for the invasion of Czechoslovakia ? >>>> Yugoslavia
When was the word "Slavs" used in the national anthem of Yugoslavia ? >>>> 1943–1992

Answer: spans: 1943–1992