Reply #80: in the case of Brazil there was no hostage exchange on the way

[AlphaCentauri]

the case is clearly explain here but never saw Colombia accusing Brazil of been a FARCs heaven.

Brazil: defending the frontier against FARC incursions. Venezuela shares with Brazil these same kinds of spillover problems. Less concerned about refugees, Brazil pays attention to drug and arms trafficking and occasional FARC incursions. Brazilians have reason to be concerned about Colombia's internal problems. Colombian insurgents and narcotraffickers have been active in Brazil's border regions for many years. Threats to Brazilian interests include smuggling contraband ranging from guns to exotic animals; direct assaults against the environment and economy from illegal loggers, gold miners, fishermen and hunters; and Colombian insurgent and drug-trafficking activities. These threats have troubled the Brazilian government for more than a decade as shown by a number of well-reported events.

In 1991 a 40-man FARC guerrilla unit attacked an army jungle operations detachment inside Brazil along the Traíra River. Three soldiers were killed and nine were wounded.30 The attack was repulsed when Brazilian special forces counterattacked into Colombia to kill seven guerrillas and recover Brazilian weapons and ammunition.31 In September 1996 the Brazilian army went on full alert because of reports that FARC elements had crossed the border into Brazil near Tabatinga, about 400 km south of the Traíra River incident. About 1,000 soldiers deployed throughout Tabatinga to guard border locations, military installations and the airport.32

On 1 November 1998, across from the Dog's Head (Cabeça do Cachorro) region of Brazil's Amazonas state, 1,400 FARC combatants attacked to seize Mitú, the provincial capital of Colombia's Vaupes Department. Mitú serves as a transshipment point for chemicals essential in making cocaine. The contraband chemicals move up the Vaupes River from Brazil to production areas in Colombia.33 To drive the FARC out of Mitú, 500 Colombian army paratroopers landed at the Querari, Brazil, airstrip (close to the border about 75 km east of Mitú) and attacked westward into their own country, regaining Mitú on 4 November. In the battle, 150 Colombian combatants, seven civilians and five FARC guerrillas were reported killed, and the FARC took 40 to 45 police prisoner.34

Again in 1999 Brazilian intelligence identified the army's airfield at Querari as a FARC target. It was thought that the FARC intended to deny Colombian armed forces' use of the strip during a guerrilla follow-on attack against Mitú. Pre-empting the FARC in late October, a 249-man Brazilian special forces unit spearheaded a major offensive to secure the Querari airfield and reinforce the Dog's Head area with 5,000 men of the Amazon Military Command. They deployed along the border from Sao Joaquim to Vila Bittencourt on a 600-km front to deter any attack.

http://leav-www.army.mil/fmso/documents/colombia_threat/colombia_threat.htm