As Israel heads for its 20th parliamentary elections on Tuesday, the Middle East nation is expected to see a wave of change, as polls show an imminent ouster of Prime Minister Benjamin Netanyahu, while the hitherto nondescript Arab alliance is set to storm into the Knesset with unprecedented seats. 

Most polls have predicted a win for the Zionist Union, headed by leftist Isaac Herzog who has partnered with centrist Tzipi Livni.

The change from the right-wing Likud politics to the centrist Zionist Union is predicted on the basis that most Israelis are focusing on socio-economic factors instead of the security issue, demanding a change in the cost of living and seeking affordable housing.

The Joint Arab List, an alliance representing Israel's Arab minority that makes up 20% of the population, is expected to become the third-largest party in the Knesset for the first time in history. Some polls predict the coalition may win up to 15 seats.

As thousands of Israelis will pour into polling booths on Tuesday to decide the future of the nation for the next four years, here is a look at the frenetic campaigning that swept over Israel ahead of the poll.

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  • israel elections
    Israel's Prime Minister Benjamin Netanyahu (R) and Isaac Herzog, Co-leader of the centre-left Zionist Union, are pictured together as campaign billboards rotate in Tel Aviv, March 9, 2015.Reuters
  • israel elections
    Election campaign posters depicting Tzipi Livni and Isaac Herzog, heads of the centrist Zionist Union party, are seen at the party's headquarters in Tel Aviv March 11, 2015.Reuters
  • israel elections
    A woman walks past a Joint Arab List campaign billboard in the Arab Israeli town of Umm el-Fahm March 9, 2015.Reuters
  • israel elections
    Isaac Herzog, head of the centrist Zionist Union party, holds a news conference with party co-leader Tzipi Livni (silhouetted behind him) in Tel Aviv to introduce the party's platform for the March 17 election, March 8, 2015.Reuters
  • israel elections
    Election campaign posters depicting Isaac Herzog (L), co-leader of the centre-left Zionist Union, are seen at the party's headquarters in Tel Aviv March 11, 2015.Reuters
  • israel elections
    Israelis gather at a rally, calling for a change of Government and to replace Prime Minister Benjamin Netanyahu, at Rabin Square in Tel Aviv, March 7, 2015.Reuters