Alyansang Tapat sa Lasallista was established on August 16, 1985 during the height of student activism in La Salle just before the first EDSA revolt. Before that, it was known as Panudla (meaning arrow in Filipino,) which stands for Party of Nationalist, United, Democratic, Lasallites. Panudla was among the first political parties established after the reestablishment of the Student Councils upon the lifting of martial law. Panudla was very militant in its approach and led people to suspect them as being a communist front, which was far from the truth. Panudla was a leftist organization then but it was not officially connected with the underground movement. This led the reorganization of Panudla into Alyansang Tapat Sa Lasallista.
 
Below is a brief, year-by-year account of what happened during the time of our establishment until today.

1984 - Sambisig, the predecessor of Panudla, battles Sandigan for seats in the Student Council. Sambisig won led by Hernani Braganza who was elected President. Braganza once used his influence as a student leader and rallied the students to create a barricade around the gates of the campus in protest of exorbitant tuition fee increases. This barricade led to the creation of the Multi-Sectoral Committee on Budget, our safeguard against unjustifiable tuition fee increases.

1985 - Panudla vs. Lakas Lasallista. Lakas Lasallista prevailed. Panudla disbanded and reorganized into Alyansang Tapat Sa Lasallista on August 16, 1985.

1986 - The rivalry between Tapat and Santugon begins. Tapat triumphs with Barry Ubarra elected President. He continued the fight against unjustified tuition fee increases and collected tuition fees from students in protest of this.

1987 - Tapat sweeps the Executive Board (EB) for the first time. Tapat battles it out with Tinig. In a yet unequaled result, every candidate fielded by Tapat wins except for one. Tapat retains the presidency with Ricky Aguas elected President.

1988 - A faction weakened the party. Linkod La Salle is formed. Tapat loses the majority including the Presidency.

1989 - Tapat did not field candidates for the election to strengthen internal operations.

1990 - After a successful rebuilding effort, Tapat's revenge is sweet. It once again dominated the election with Omar Mercado elected President and capturing all EB positions once again. Tapat also wins three of the College Presidency seats and majority of the batch level positions.

1991 - Tapat again fielded Omar Mercado for the SC presidency, who later won, earning himself the title of the only two-time Student Council President in La Salle.

1992 - Tapat unfortunately lost the presidency but was still able to capture majority seats in the Student Council.

1993 - Tapat regains the presidency with Araceli Habaradas elected president. It also wins four out of remaining five EB positions, and retains majority seats in the SC. It was during this year that the draft for the Students Charter was completed. The Students Charter is a list of rights inherent to students and cannot be violated by any member of the community. It remains to be our most powerful defense against anyone who wishes to trample upon our rights as students and is our most valued tool for the achievement of true empowerment.

1994 - Tapat sweeps the EB for the third time with Ampy Rio leading as SC President. It was during this year when the SC heavily lobbied for the ratification of the Students Charter.

1995 - Tapat sweeps the EB for the fourth time. Vince Dizon wins as SC President. Under his leadership and after years of determination, the Students Charter is ratified. It was also this year that the Inter-Fraternity Assembly was established in an effort to solve campus violence.

1996 - Tapat loses the presidency but gains half of the EB positions and four of the six College Assembly President positions.

1997 - Tapat sweeps the EB for the fifth time. With the battle cry "Ibalik ang Dapat!", Nikki Briones is elected SC President. The internal mechanisms of the SC are strengthened and groundwork is laid for the fulfillment of the Student Council vision.

1998 - The presidency is retained with John Roe Guray elected President. Focus on relevant issues was put in place and thru the SC, DLSU was the only school in the country which was able to pass a stand to the Senate regarding the Visiting Forces Agreement.

1999 - This General Election was a tough one for Tapat but it still managed to pull through winning the top five out of six EB positions with Rowena Sy elected President. The campaign focused on the values of unity and collective effort, experience and expertise, focused leadership, political maturity, and social responsibility.

2000 - Jolina Mallari is elected President. The Student Council launches "Operation Empowerment" which resulted in the revision of the Dress Code and the No Eating Policy in the university.

2001 - Tapat captures the Presidency for the fifth consecutive year led by Student Council President Emmeline Aglipay. The SC focused on maximizing the youth's vital role in nation building. Through the leadership of Emmeline Aglipay, the Student Cooperative, the first ever enterprise owned, run, and made for the students is established with the Buy Back Books program as its pilot project. Tapat participates in EDSA II.

2002 - Tapat launches Supreme Citizen Empowerment as its campaign platform in an effort to strengthen the nationalist ideals in students during the time when the country was in transition after the Estrada administration crumbled.

2003 - Tapat regains the presidency with St. Anthony Tiu elected President. Supreme Citizen Empowerment is furthered in the Student Council thru "Boto Lasalyano! Sulong Pilipino!", a comprehensive voter's education and vigilance campaign in preparation for the presidential elections the following year.

2004 - Despite fierce competition, Tapat produces its fourteenth Student Council President with Jillian Sze elected Student Council President. Tapat, for the third straight year, adopts Supreme Citizen Empowerment as its platform of government. This platform takes a big leap forward as the Student Council completes the first draft of the proposed Students' Code, which aims to protect the rights of students in the entire country. Plans for a University Student Government (USG) are also furthered in the Student Council.

2005 - Tapat sweeps the EB for the sixth time led by Student Council President Army Padilla. Tapat also captures 5 out of the 6 College Assembly President positions. Tapat adopts the vision of a Just and Free Society as its campaign platform.  Army Padilla fought for the removal of the minor and major offense in the ID policy and the minor offense in the Dress Code policy, among other changes, in the Student Handbook Revisions.  Efforts for the Gawad Kalinga was heightened through the mobilization of the student body.  The Activities Manual which aims to lessen the bureacracy in activity processing was drafted.  At the same time, the drafting of the Reservations Manual was also initiated.  The Curriculum Review for the Academic Development (CRADLE) was also established to ensure that quality of Lasallian eduction.  The Cultural Development Award was also successfully lobbied to be included as one of the Special Graduation Awards given by the University.

2006 – Tapat Captures the EB for the the seventh time.  Simoun Ferrer elected as the sixteenth Tapat Student Council President.  During this year, the Students Personnel Services Council was revived.  A proposal for a National Federation of Student Councils of De La Salle Philippines was initiated.  Under his leadership, the Committee for National Issues and Concerns, a multi-sectoral committee that aims to heighten Lasallians’ social consciousness and ratify Universty stands on pressing national issues was established.  Boto Lasalyano!  Sulong Pilipino! was relaunched for the 2007 National Elections.  The Office of Student Lawyers was also institutionalized to further protect students’ rights in disciplinary case deliberations.  The Council of University Representatives was formalized to ensure the accountability of the various University Committee student representatives.  It was also this year that the Activities Manual was finally lobbied.  Another student-oriented service through the Centralized Locker System was created.  To ensure that fees are justifiable, the Comprehensive Price Review (CPR) was pioneered.  The Student Council Apprenticeship Program (SCAP,) that aims to hone the leadership skills and potential of students, was also initiated.

2007 – Tapat captures 10 out 12 seats of the Student Council Executive Committee, including Noey Arcinue, the 18th Student Council President from Tapat.  Already, the SC has produced a stand against Rental Fees on University Facilities put up by the Administration that is a direct hindrance to student empowerment.

2008 – Tapat once again, captures the 10 out of the 12 seats of the Student Council Executive Committee, including Nicole Villarojo, the 19th Student Council President from Tapat.