Strength is in Unity was formed as a political coalition in 2018 in the lead-up to that year's presidential election, backing the candidacy of Grigol Vashadze.

The faction had participated in numerous boycotts since entering the parliament and was in strong opposition to what it saw as pro-Russian policies of the Georgian Dream government.

Strength Is in Unity coalition was formed on July 18, 2018, ahead of that year's presidential election with the goal of uniting small political parties opposed to the Georgian Dream-led government.

The alliance backed Grigol Vashadze, a former Foreign Minister and future chairman of United National Movement (UNM), as its presidential candidate.

[citation needed] By 2020, the SIU coalition had been informally disbanded as political parties sought independent paths and electoral strategies.

The 2019–2020 large-scale demonstrations, followed by the failure by Parliament to pass a compromise constitutional amendment on electoral reform in November 2019 and the 8 March 2020, agreement between Georgian Dream and the opposition each contributed to the creation of a negotiation format amongst opposition parties that set them apart, while leaving the smallest political parties in SIU with little to no funding, press coverage or membership.

[citation needed] The coalition experienced its largest setback in July 2020 after the group rejected the prime ministerial candidacy of Giorgi Vashadze, the leader of New Georgia.

[11] Out of the 36 seats 17 were allocated to UNM, 4 - Progress and Freedom, 3 - State for the People, 2 - Republicans, while the remaining 10 to nominally "non-partisan" candidates (out of which one was a member of Victorious Georgia and another one - National Democratic Party).

[15] In the aftermath of the election and the ensuing political crisis, SIU, along with other major opposition parties, backed negotiations with Georgian Dream facilitated by Western powers.

[17] The crisis worsened when authorities arrested UNM chairman and coalition de facto leader Nika Melia on February 28.

On March 1, 2021, EU Council President Charles Michel launched new negotiations between Georgian Dream and the opposition to put an end to the political crisis and SIU was represented in those talks by Salome Samadashvili and Akaki Minashvili of UNM and Khatuna Samnidze of the Republican Party.

This refusal proved to be controversial and led to the Republican Party leaving the coalition, along with Grigol Vashadze and Salome Samadashvili, who each signed the agreement independently.

On the day the SIU faction joined Parliament, the Georgian Dream majority declared a recess to prevent a speech by UNM chairman Nika Melia and to postpone voting on two bills opposed by the faction (one stripping public funding for boycotting parliamentary parties and one declaring an amnesty on both demonstrators and police officers involved in the dispersal of protests in 2019).

[21] Since June 2022, the faction has presented a reform plan to address the 12 recommendations imposed by the European Commission as preconditions for Georgia's EU membership candidacy status.

[25] On February 7, the Faction announced a boycott of its parliamentary work to protest the refusal by the Georgian authorities to allow the transfer of Saakashvili abroad for medical treatment.

[citation needed] On 20 July 2023, the remaining SU members and Strategy Aghmashenebeli announced the formation of a political coalition titled Victory Platform.