Both Britain and Russia have sent military units to the Mediterranian as the crisis in Syria deepens.
Britain has sent six Typhoon gets to a base in Cyprus, while Russia has sent warships to waters near the Arabian peninsula.
US president Barack Obama says there's international agreement that the use of chemical weapons cannot be tolerated - and says the US has concluded that the Syrian government was responsible.
However, he has said that there hasn't yet been a decision made on whether the US will go ahead with a military mission.
Britain's House of Commons is debating the UK's response today, but the Ministry of Defence says it's already sent six RAF Typhoon jets to a British case in Cyprus - an obvious base to launch an air attack.
The international rhetoric is continuing. Israel's president Shimon Peres tweeted that his country will respond "with all its might" if it's drawn into an attack.
Meanwhile Saudi Arabia could also become embroiled in the situation.
The official state news agency of Iran says Vladimir Putin will strike against Saudi Arabia if the west intervenes in Syria - allegedly because Saudi Arabia could otherwise free Chechen terrorists to attack next year's Winter Olympics.