CAIRO ( AP) — Tens of thousands of Egyptians rallied today to mark the first anniversary of the country’s 2011 uprising, with liberals and Islamists gathering on different sides of Cairo’s Tahrir Square in a reflection of the deep political divides that emerged in the year since the downfall of longtime leader Hosni Mubarak.

Groups like the Muslim Brotherhood and their liberal and secular rivals differ over the goals of the revolution and the strategy to achieve them, in particular the relationship with the country’s interim military leaders.

Military generals led by Field Marshal Hussein Tantawi took over from Mubarak when he stepped down on Feb. 11, 2011. The ousted president is now on trial for his life on charges of complicity in the killing of hundreds of protesters during the uprising.

Volunteers from the Brotherhood, a fundamentalist group that won just under half of parliament’s seats in recent elections, were checking IDs and conducting searches of the thousands flocking to join the protests.

Other Brotherhood followers formed a human chain around a large podium set up overnight by the group. The Brotherhood loyalists were chanting religious songs and shouting, “Allahu Akbar,” or God is great.

In contrast, liberals on the other side of the square were chanting, “Down, down with military rule,” and demanding that Tantawi, Mubarak’s defense minister for nearly 20 years, be executed.