Ankara is continuing to ratchet up tensions with Paris over a proposed French law to criminalize denial of claims that Turkey's mass killings of Armenians before and during World War I constitute genocide.
Ankara, which rejects the charge of genocide and argues the widespread killings of its Armenian minority occurred during civil strife in which many Turks died as well, dispatched a high-level delegation of parliamentarians in a last-minute bid to lobby against the proposed law.
Historians say up to 1.5 million Armenians were killed during the collapse of the Ottoman Empire in World War I, and several countries recognize the killings as genocide. Under the proposed French legislation, denying the genocide would be punishable by up to one year in prison along with a $58,000 fine.
On Saturday, Turkish Prime Minister Recep Tayyip Erdogan launched a stinging attack on France, saying that no historian or politician can see genocide in Turkish history, and that those who do want to see genocide should turn around and look at their own "dirty and bloody history."
Relations between Turkey and France are already tense in connection with French President Nicolas Sarkozy's strong opposition to Ankara's bid to join the European Union. Erdogan last week reportedly sent a letter to Sarkozy warning of dire consequences if the legislation passes.
Diplomatic correspondent Semih Idiz of the Turkish newspaper Milliyet warns such threats should be taken seriously.
"I think it is serious, I think that the government will make a big issue out of this - [it] is not one that they can afford to let go by," he says. "In terms of public opinion, this is one of [the] most [touchy] of issues for Turks, and you cannot just take it lightly."
Opposition to the genocide claim is one of the few issues that unite Turkey's normally polarized main political parties.
The main opposition People's Republican Party is due to send its own deputies to Paris to lobby against the controversial legislation, and the leader of the National Action party, Devlet Bahceli, strongly backs Erdogan's tough stance against Paris.
With such cross-party support, the potential repercussions to French-Turkish relations are expected to be severe. Turkish officials have said their ambassador to France, Tahsin Burcuoglu, will be recalled if the French parliament passes the legislation.
International relations expert Soli Ozel of Kadir Has University warns that will be just the beginning.
"[They could] ban the French companies from all economic bidding," he says. "For the future, [they will] not give the French companies the light of day. And wherever they can block France, they will try to so."
Last week, Turkish Foreign Minister Ahmet Davutoglu summoned representatives of leading French companies to explain what is at stake for them. With Turkish exchange accounting for 2.5 percent of France's annual international trade, observers say such threats will have a limited effect. But the repercussions of a deepening dispute threaten to extend beyond France to the whole European Union.
"I think there is this negative potential, based on good information the Turkish foreign minister met with EU ambassadors and lashed out at them over this issue," says Idiz.
Foreign Minister Davutoglu has warned the European Union it has a responsibility to protect freedom of speech.
The ongoing crisis in Syria may also be affected. Despite strained relations, Paris and Ankara have found common ground in their opposition to Damascus' ongoing crackdown on dissent.
But the head of the Turkish Parliament's Foreign Affairs Committee, Volkan Bozkir, warned in Paris that bilateral cooperation in the region would be significantly harmed if the legislation was passed.