In April 1969, after the brigade was moved from Mansura camp to Pilon camp, it underwent an upgrading process and its name was changed to the 188th Armored Brigade. Gradually, it was modified into a regular brigade, relpacing its old “Sherman” tanks with powerful pattern. It become the main operations arm of the northern command for combat in the War of Attrition which followed the victory of the Six Day War for 3 years. On May 12th 1970, the brigade participated in a raid in Lebanon to clean up the Fatah land area. At the time, it was the most complex and difficult tank operation in mountainous terrain ever to have been performed by the IDF and it was a test not only for the brigade, but for the whole armored corps. The excellent performance of the brigade in this operation, which was called Kalachat, was praised by the Chief of the General Staff and the GOC Northern Command general.
The brigade was never allowed to rest for long. Not sooner was operation Kalachat completed than the Operation Kiton operation began. In June, the Syrians threatened the cease-fire line. The height of their aggression was on June 25th, when they opened artillery fire along the line and tried to attack two IDF posts. The Barak brigade was responsible for responding to the Syrians, with an infiltration in the southern sector of the Heights. A day of fighting ensued, after which the brigade penetrated the Syrian fortified lay-out and fought against Syrian tanks. The end result was extensive losses of both men and equipment to the enemy. After these two operations, there was relative quiet along the borders with Syria and Lebanon. However, at the start of 1972, fighting renewed, particularly in the Lebanese area. Once again, the brigade went into Lebanon, and once again the many terrorist bases were destroyed. There were also two more days of battle with the Syrians, and the achievements of the young brigade earned for itself the reputation as a unit capable of formulating new combat doctrines in mountainous terrain; a unit which did not hesitate to employ innovative methods to achieve perfection.