Operation Épervier began on the night of 13-14 February 1986, under the defence agreement between France and Chad, and was prepared during a meeting in
N'Djamena between the
Chadian President Hissène Habré and the
French Defence Minister Paul Quilès. Its goal was to contain the
Libyan invasion that had resulted in the loss of all Chadian territory north of the
16th parallel and was threatening the capital; a new offensive had been started on 10 February by Libyan leader
Muammar Gaddafi in the belief that there would be no French reaction. The
French Air Force was the first to strike: on 16 February an
air raid on Ouadi Doum badly damaged the Ouadi Doum airbase, a strategic air base in Chad from which Libyan planes could attack N'Djamena and hamper the deployment of troops. On 17 February 1986, in retaliation for the Ouadi Doum air raid, a
LARAF Tupolev Tu-22B attacked the airport at N'Djamena. The bomber ran into technical problems on its return journey. U.S. reconnaissance planes based in Sudan monitored distress calls sent by the pilot of the Tu-22 that probably crashed before reaching its base at Aouzou (it may have been hit by twin-tubes that fired in N'Djamena airport). On 18 February, 200 French
Commandos took possession of Camp Dubut, near N'Djamena, which had previously been France's headquarters during
Operation Manta (1983–1984). The commandos secured the camp for the mission's air force. The air force arrived the night of the 18th and was composed of six
Mirage F1, four
Jaguar fighter-bombers, and a battery of low altitude (anti-aircraft)
Crotale missiles. To defend the capital and the camp against high altitude air attacks a battery of French Army Air Defense
MIM-23 Hawk missiles arrived on 3 March, and shortly afterwards a radar was stationed at
Moussoro, defended by 150 French troops. This brought the total number of troops in the country to 900. For months the troops remained largely inactive, and the air force limited itself to reconnaissance missions for the Chadian army, remaining careful not to cross the 16th parallel. But when in October the leader of the GUNT
Goukouni Oueddei rebelled against Gaddafi, and vicious fighting erupted in the
Tibesti between his
People's Armed Forces militia (1,500 to 2,000 men) and the Libyan army, who had 8,000 men in Chad, the situation changed. Overwhelmed by superior forces, Goukouni's forces were in peril; this led France to plan a mission to help the Tibesti rebels. On the night of 16-17 September, two
Transall transport aircraft parachuted 6,000 litres of
gasoline, munitions, provisions and
anti-tank and
anti-aircraft missiles into the Tibesti. It was also reported by
Le Monde that a small number of French soldiers had secretly entered the Tibesti to support Goukouni's men. On 2 January 1987 Habré's troops invaded the capital of the
Ennedi,
Fada; the battle was a triumph for the Chadians, while 781 Libyans remained on the ground. A decisive role was played by French supplies, especially the anti-tank
MILAN missiles. Gaddafi answered by violating the red line of the 16th parallel; Libyan planes bombed
Arada, 110 km south of the line, and Oum-Chalouba, close to a new French base established at
Kalaït, exactly on the 16th parallel, manned by 250 troops. France's reaction was to bomb again on 7 January the airbase of Ouadi Doum: the fourteen aircraft employed in the operation destroyed the Libyan radar station, but limited themselves to this. In what appears to have been an escalation, Libyan forces raided the French-Chadian base of Kalaït on 11 January; it was the first direct attack on the French contingent, which suffered no losses. Additionally, Gaddafi prepared a vast offensive: he added 4,000–6,000 troops to the 8,000 men stationed in the
Bourkou-Ennedi-Tibesti. In the meantime, the French also strengthened their forces; in February Operation Épervier reached 2,200 men and established two new bases at
Biltine and
Abéché (Camp Moll), in eastern Chad. Habré concentrated most of his forces near Fada; and when on 18 March the Libyan offensive was at last started the result was a disaster for Gaddafi. 1,200 Libyans were killed and 500 taken prisoner, and
Faya-Largeau, the main Libyan stronghold in Chad, was taken without fighting on 27 March. In this recapture of Northern Chad, France did not officially take part in the fighting; but it is believed that a special unit of the
DGSE (
Service Action) participated in the taking of Ouadi Doum. In May, when the French Defence Minister
Alain Giraud visited the town of Faya-Largeau, the policy of respect of the 16th parallel by the French troops was declared no longer applicable. Libyan expulsion from Chad did not end the Chadian–Libyan conflict: the dispute over who was the rightful possessor of the
Aouzou strip remained open, and when Habré occupied Aouzou on 8 August, the French contingent was once again involved. On 25 August Gaddafi's forces bombed Faya-Largeau, where a French parachute regiment was stationed, but damage was minimal. Habré started new offensive, on 7 September a
Tupolev Tu-22 was sent to bomb the capital, but the aircraft was destroyed by the French Army
MIM-23 Hawk battery. A simultaneous Libyan attack on Abéché was more successful, if not very effective, owing to the inadequacy of the French Air Force SAM Crotale battery recently deployed. France decided not to react to these attacks, to prevent an escalation. On 11 September the Chadian and Libyan governments accepted a ceasefire mediated by the
OAU, which put an end to the conflict. While long negotiations between the two parties started, the French continued to fortify their positions in Chad, including completion of an air strip at Abéché in September. The French started assuming humanitarian tasks, such as mine-clearing in northern Chad; it was during one of these missions that Operation Épervier reported on its first loss on 14 January 1988. The Chadian–Libyan conflict officially came to an end in October 1988, when Chad resumed formal diplomatic relations with Libya, in accordance with recommendations made by the OAU. As a result, the French contingent started decreasing in size. Cost was another reason for a decrease in France's military presences: in 1987 alone, Operation Épervier had cost France 1.7 billion
French francs. In 1989 the number of men deployed to Chad had fallen to 1,000, and many minor bases had been dismantled. ==New president in Chad, 1990s==