Question: When did the troops of the country blamed for the stagnation and failure of the Tripartite discussion leave the country known for Afghan bread?

Knowledge 1: Afghan bread
نان افغانی), is the national bread of Afghanistan. The bread is oval or rectangular and baked in a tandoor, a cylindrical oven that is the primary cooking equipment of the sub-continental region. The Afghan version of the tandoor sits above ground and is made of bricks, which are heated to cook the bread. The bread, also known as "naan", is shaped and then stuck to the interior wall of the oven to bake. It is really similar to the Naan in KPK, Pakistan. Black cumin or caraway seeds are often sprinkled on the bread, as much for decoration as for taste, and lengthwise lines are scored in the dough to add texture to the bread. [SEP] Knowledge 2: Molotov–Ribbentrop Pact
By the end of May, drafts were formally presented. In mid-June, the main Tripartite negotiations started. The discussion was focused on potential guarantees to central and east European countries should a German aggression arise. The USSR proposed to consider that a political turn towards Germany by the Baltic states would constitute an "indirect aggression" towards the Soviet Union. Britain opposed such proposals, because they feared the Soviets' proposed language could justify a Soviet intervention in Finland and the Baltic states, or push those countries to seek closer relations with Germany. The discussion about a definition of "indirect aggression" became one of the sticking points between the parties, and by mid-July, the tripartite political negotiations effectively stalled, while the parties agreed to start negotiations on a military agreement, which the Soviets insisted must be entered into simultaneously with any political agreement. [SEP] Knowledge 3: War on Terror
The origins of al-Qaeda can be traced to the Soviet war in Afghanistan (December 1979 – February 1989). The United States, United Kingdom, Saudi Arabia, Pakistan, and the People's Republic of China supported the Islamist Afghan mujahadeen guerillas against the military forces of the Soviet Union and the Democratic Republic of Afghanistan. A small number of "Afghan Arab" volunteers joined the fight against the Soviets, including Osama bin Laden, but there is no evidence they received any external assistance. In May 1996 the group World Islamic Front for Jihad Against Jews and Crusaders (WIFJAJC), sponsored by bin Laden (and later re-formed as al-Qaeda), started forming a large base of operations in Afghanistan, where the Islamist extremist regime of the Taliban had seized power earlier in the year. In February 1998, Osama bin Laden signed a fatwā, as head of al-Qaeda, declaring war on the West and Israel, later in May of that same year al-Qaeda released a video declaring war on the U.S. and the West.
Knowledge 1: Afghan bread
نان افغانی), is the national bread of Afghanistan. The bread is oval or rectangular and baked in a tandoor, a cylindrical oven that is the primary cooking equipment of the sub-continental region. The Afghan version of the tandoor sits above ground and is made of bricks, which are heated to cook the bread. The bread, also known as "naan", is shaped and then stuck to the interior wall of the oven to bake. It is really similar to the Naan in KPK, Pakistan. Black cumin or caraway seeds are often sprinkled on the bread, as much for decoration as for taste, and lengthwise lines are scored in the dough to add texture to the bread. [SEP] Knowledge 2: Islamism
The quick and decisive defeat of the Arab troops during the Six-Day War by Israeli troops constituted a pivotal event in the Arab Muslim world. The defeat along with economic stagnation in the defeated countries, was blamed on the secular Arab nationalism of the ruling regimes. A steep and steady decline in the popularity and credibility of secular, socialist and nationalist politics ensued. Ba'athism, Arab socialism, and Arab nationalism suffered, and different democratic and anti-democratic Islamist movements inspired by Maududi and Sayyid Qutb gained ground. [SEP] Knowledge 3: War on Terror
The origins of al-Qaeda can be traced to the Soviet war in Afghanistan (December 1979 – February 1989). The United States, United Kingdom, Saudi Arabia, Pakistan, and the People's Republic of China supported the Islamist Afghan mujahadeen guerillas against the military forces of the Soviet Union and the Democratic Republic of Afghanistan. A small number of "Afghan Arab" volunteers joined the fight against the Soviets, including Osama bin Laden, but there is no evidence they received any external assistance. In May 1996 the group World Islamic Front for Jihad Against Jews and Crusaders (WIFJAJC), sponsored by bin Laden (and later re-formed as al-Qaeda), started forming a large base of operations in Afghanistan, where the Islamist extremist regime of the Taliban had seized power earlier in the year. In February 1998, Osama bin Laden signed a fatwā, as head of al-Qaeda, declaring war on the West and Israel, later in May of that same year al-Qaeda released a video declaring war on the U.S. and the West.
Knowledge 1: Afghan bread
نان افغانی), is the national bread of Afghanistan. The bread is oval or rectangular and baked in a tandoor, a cylindrical oven that is the primary cooking equipment of the sub-continental region. The Afghan version of the tandoor sits above ground and is made of bricks, which are heated to cook the bread. The bread, also known as "naan", is shaped and then stuck to the interior wall of the oven to bake. It is really similar to the Naan in KPK, Pakistan. Black cumin or caraway seeds are often sprinkled on the bread, as much for decoration as for taste, and lengthwise lines are scored in the dough to add texture to the bread. [SEP] Knowledge 2: Molotov–Ribbentrop Pact
By the end of May, drafts were formally presented. In mid-June, the main Tripartite negotiations started. The discussion was focused on potential guarantees to central and east European countries should a German aggression arise. The USSR proposed to consider that a political turn towards Germany by the Baltic states would constitute an "indirect aggression" towards the Soviet Union. Britain opposed such proposals, because they feared the Soviets' proposed language could justify a Soviet intervention in Finland and the Baltic states, or push those countries to seek closer relations with Germany. The discussion about a definition of "indirect aggression" became one of the sticking points between the parties, and by mid-July, the tripartite political negotiations effectively stalled, while the parties agreed to start negotiations on a military agreement, which the Soviets insisted must be entered into simultaneously with any political agreement. [SEP] Knowledge 3: Islamism
The quick and decisive defeat of the Arab troops during the Six-Day War by Israeli troops constituted a pivotal event in the Arab Muslim world. The defeat along with economic stagnation in the defeated countries, was blamed on the secular Arab nationalism of the ruling regimes. A steep and steady decline in the popularity and credibility of secular, socialist and nationalist politics ensued. Ba'athism, Arab socialism, and Arab nationalism suffered, and different democratic and anti-democratic Islamist movements inspired by Maududi and Sayyid Qutb gained ground.

Answer: February 1989