As oxygen ran low , crew members attempted to replace Change_of_leadership a potassium superoxide chemical oxygen cartridge , which accidentally fell Motion_directional into the oily sea water and exploded Use_firearm on contact Connect .

chemical warfare service teams were trained Education_teaching in its use , and signal corps personnel in its maintenance .

According to Blair , the trigger Causation was Iraq 's failure Earnings_and_losses to take Getting a `` final Process_end opportunity '' to disarm Removing itself of alleged Statement nuclear , chemical , and biological weapons that U.S. and British officials called an immediate and intolerable threat Catastrophe to world peace .

And while hundreds of chemical weapons were found Know in Iraq after the invasion Attack , they determined Deciding to be produced Manufacturing before the 1991 Gulf War , from years earlier in Saddam Hussein 's rule Control and were unusable .

About 5,000 chemical warheads , shells or aviation bombs were discovered Know during the Iraq War Military_operation , but as these had been built Building and abandoned GiveUp before 1991 , the discoveries Know of these chemical weapons also did not support Supporting the government 's invasion rationale .

About 5,000 chemical warheads , shells or aviation bombs were discovered Know during the Iraq War Military_operation , but as these had been built Building and abandoned GiveUp before 1991 , the discoveries Know of these chemical weapons also did not support Supporting the government 's invasion rationale .

The Huế chemical attacks Attack occurred Presence on 3 June 1963 , when soldiers of the Army of the Republic of Vietnam ( ARVN ) poured Motion liquid chemicals from tear gas grenades onto the heads of praying Rite Buddhists in Huế , South Vietnam .

An inquiry Scrutiny determined Deciding that the chemical used Using in the attack Attack was a liquid component from old French tear gas grenades that had never functioned properly .

The Ghouta chemical attack Attack occurred Presence in Ghouta , Syria during the Syrian Civil War Hostile_encounter , in the early hours of 21 August 2013 .

Two opposition-controlled areas in the suburbs around Damascus , Syria were struck Attack by rockets containing the chemical agent sarin .

The attack Attack was the deadliest use Using of chemical weapons since the Iran–Iraq War Hostile_encounter .

Inspectors from the United Nations Mission already in Syria to investigate Research an earlier alleged chemical weapons attack Attack requested Request access to sites in Ghouta the day after the attack Attack and called Request for a ceasefire Process_end to allow Preventing_or_letting inspectors to visit Traveling the Ghouta sites .

The evidence available concerning the nature , quality and quantity of the agents used Using on 21 August indicated Statement that the perpetrators likely had access Having_or_lacking_access to the chemical weapons stockpile of the Syrian military , as well as the expertise and equipment necessary to safely manipulate Hold large amount of chemical agents . ''

The evidence available concerning the nature , quality and quantity of the agents used Using on 21 August indicated Statement that the perpetrators likely had access Having_or_lacking_access to the chemical weapons stockpile of the Syrian military , as well as the expertise and equipment necessary to safely manipulate Hold large amount of chemical agents . ''

It also stated Statement that the chemical agents used Using in the Khan al-Assal chemical attack Attack earlier in 2013 `` bore the same unique hallmarks as those used Using in Al-Ghouta '' .

It also stated Statement that the chemical agents used Using in the Khan al-Assal chemical attack Attack earlier in 2013 `` bore the same unique hallmarks as those used Using in Al-Ghouta '' .

Åke Sellström , the leader of the UN Mission , characterized Statement government explanations of rebel chemical weapons acquisition as unconvincing , resting in part upon `` poor theories '' .

On 10 September 2013 , the military intervention was averted Preventing_or_letting when the Syrian government accepted Agree_or_refuse_to_act a US–Russian negotiated deal to turn over `` every single bit '' of its chemical weapons stockpiles Preserving for destruction Destroying and declared Expressing_publicly its intention Aiming to join Becoming_a_member the Chemical Weapons Convention .

In June 2018 the OPCW noted Know with concern that the Syrian Arab Republic had in reality neither declared Expressing_publicly nor destroyed Destroying all of its chemical weapons and chemical weapons production Creating facilities .

In June 2018 the OPCW noted Know with concern that the Syrian Arab Republic had in reality neither declared Expressing_publicly nor destroyed Destroying all of its chemical weapons and chemical weapons production Creating facilities .

The Faw Peninsula was later recaptured Conquering by Iraqi forces near the end of the war by the massive and illegal use of chemical weapons .

Iran managed to maintain their foothold in Al-Faw against several Iraqi counter-offensives , including Republican Guard assaults and chemical attacks Attack , for another month despite heavy casualties until a stalemate was reached Achieve .

The conflict Hostile_encounter has been compared to World War I in terms of the tactics used , including large-scale trench warfare with barbed wire stretched across fortified defensive lines , manned machine guns posts , bayonet charges , Iranian human wave attacks , extensive use of chemical weapons by Iraq , and , later , deliberate attacks on civilian targets .

after the murder Killing of two female hostages two-and-a-half days in , spetsnaz operators from federal security service ( fsb ) alpha and vympel , supported Supporting by a russian ministry of internal affairs ( mvd ) unk unit , pumped Self_motion an undisclosed chemical agent into the building 's ventilation system and began Process_start the rescue operation .

During the battle Hostile_encounter , the Imperial Japanese Army extensively used Using chemical weapons .

The Athens Prosecutor agreed Agree_or_refuse_to_act to an investigation Scrutiny into accusations Statement of excessive use of tear gas , as well as the alleged Statement use of other expired and carcinogenic chemical substances .