Conscription
Norway: Conscription was constitutionally established the 12 April 1907 with Kongeriket Norges Grunnlov § 119.. 
As of March 2016, Norway currently employs a weak form of mandatory military service for men and women. In practice recruits are not forced to serve, instead only those who are motivated are selected. About 60,000 Norwegians are available for conscription every year, but only 8,000 to 10,000 are conscripted. Since 1985, women have been able to enlist for voluntary service as regular recruits. On 14 June 2013 the Norwegian Parliament voted to extend conscription to women, resulting in universal conscription in effect from 2015. This made Norway the first NATO member and first European country to make national service compulsory for both sexes. In earlier times, up until at least the early 2000s, all men aged 19–44 were subject to mandatory service, with good reasons required to avoid becoming drafted. There is a right of conscientious objection. As of 2020 Norway did not reach gender equity in conscription with only 33% of all conscripted being women.
In addition to the military service, the Norwegian government draft a total of 8,000 men and women between 18 and 55 to non-military Civil defence duty. (Not to be confused with Alternative civilian service.) Former service in the military does not exclude anyone from later being drafted to the Civil defence, but an upper limit of total 19 months of service applies. Neglecting mobilisation orders to training exercises and actual incidents, may impose fines.

Russia: The Russian Armed Forces draw personnel from various sources. In addition to conscripts, the 2022 Russian mobilization on account of the Russian invasion of Ukraine revealed Russian irregular units in Ukraine and Russian penal military units as sources of manpower. This adds to the BARS (Russia), the National Guard of Russia and the Russian volunteer battalions.

Serbia: As of 1 January 2011, Serbia no longer practises mandatory military service. Prior to this, mandatory military service lasted 6 months for men. Conscientious objectors could however opt for 9 months of civil service instead.
On 15 December 2010, the Parliament of Serbia voted to suspend mandatory military service. The decision fully came into force on 1 January 2011.

South Africa: There was mandatory military conscription for all white men in South Africa from 1968 until the end of apartheid in 1994. Under South African defense law, young white men had to undergo two years' continuous military training after they leave school, after which they had to serve 720 days in occasional military duty over the next 12 years. The End Conscription Campaign began in 1983 in opposition to the requirement. In the same year the National Party government announced plans to extend conscription to white immigrants in the country.

South Korea: 

Sweden: Sweden had conscription (Swedish: värnplikt) for men between 1901 and 2010. During the last few decades it was selective. Since 1980, women have been allowed to sign up by choice, and, if passing the tests, do military training together with male conscripts. Since 1989 women have been allowed to serve in all military positions and units, including combat.
In 2010, conscription was made gender-neutral, meaning both women and men would be conscripted on equal terms. The conscription system was simultaneously deactivated in peacetime. Seven years later, referencing increased military threat, the Swedish Government reactivated military conscription. Beginning in 2018, both men and women are conscripted.

Taiwan: Taiwan, officially the Republic of China (ROC), maintains an active conscription system. All qualified male citizens of military age are now obligated to receive 4-month of military training. In December 2022, President Tsai Ing-wen led the government to announce the reinstatement of the mandatory 1-year active duty military service from January 2024.

United Kingdom: The United Kingdom introduced conscription to full-time military service for the first time in January 1916 (the eighteenth month of World War I) and abolished it in 1920. Ireland, then part of the United Kingdom, was exempted from the original 1916 military service legislation, and although further legislation in 1918 gave power for an extension of conscription to Ireland, the power was never put into effect.
Conscription was reintroduced in 1939, in the lead up to World War II, and continued in force until 1963. Northern Ireland was exempted from conscription legislation throughout the whole period.
In all, eight million men were conscripted during both World Wars, as well as several hundred thousand younger single women. The introduction of conscription in May 1939, before the war began, was partly due to pressure from the French, who emphasized the need for a large British army to oppose the Germans. From early 1942 unmarried women age 20–30 were conscripted (unmarried women who had dependent children aged 14 or younger, including those who had illegitimate children or were widows with children were excluded). Most women who were conscripted were sent to the factories, but they could volunteer for the Auxiliary Territorial Service (ATS) and other women's services. Some women served in the Women's Land Army: initially volunteers but later conscription was introduced. However, women who were already working in a skilled job considered helpful to the war effort, such as a General Post Office telephonist, were told to continue working as before. None was assigned to combat roles unless she volunteered. By 1943 women were liable to some form of directed labour up to age 51. During the Second World War, 1.4 million British men volunteered for service and 3.2 million were conscripted. Conscripts comprised 50% of the Royal Air Force, 60% of the Royal Navy and 80% of the British Army.
The abolition of conscription in Britain was announced on 4 April 1957, by new prime minister Harold Macmillan, with the last conscripts being recruited three years later.

United States: Conscription in the United States ended in 1973, but males aged between 18 and 25 are required to register with the Selective Service System to enable a reintroduction of conscription if necessary. President Gerald Ford had suspended mandatory draft registration in 1975, but President Jimmy Carter reinstated that requirement when the Soviet Union intervened in Afghanistan five years later. Consequently, Selective Service registration is still required of almost all young men. There have been no prosecutions for violations of the draft registration law since 1986. Males between the ages of 17 and 45, and female members of the US National Guard may be conscripted for federal militia service pursuant to 10 U.S. Code § 246 and the Militia Clauses of the United States Constitution.
In February 2019, the United States District Court for the Southern District of Texas ruled that male-only conscription registration breached the Fourteenth Amendment's equal protection clause. In National Coalition for Men v. Selective Service System, a case brought by a non-profit men's rights organization the National Coalition for Men against the U.S. Selective Service System, judge Gray H. Miller issued a declaratory judgment that the male-only registration requirement is unconstitutional, though did not specify what action the government should take. That ruling was reversed by the Fifth Circuit. In June 2021, the U.S. Supreme Court declined to review the decision by the Court of Appeals.

Other countries: Conscription in Australia
Conscription in Egypt
Conscription in France
Conscription in Gibraltar
Conscription in Malaysia
Conscription in Mexico
Conscription in Myanmar
Conscription in New Zealand
Conscription in North Korea
Conscription in Russia
Conscription in Singapore
Conscription in South Korea
Conscription in Switzerland
Conscription in Turkey
Conscription in Ukraine
Conscription in the Ottoman Empire
Conscription in the Russian Empire
Conscription in Vietnam
Conscription in Georgia
Conscription in Mozambique

See also: 

References: 

Further reading: 

External links:  The dictionary definition of conscription at Wiktionary
 Media related to Conscription at Wikimedia Commons