[4] After the invasion, the city has been a site of conflict with the Islamic State, culminating in the Second Battle of Tikrit from March to April 2015, which resulted in the displacement of 28,000 civilians.

[9] Under Marutha of Tikrit, the bishopric was elevated into a maphrianate and the city's ecclesiastical jurisdiction extended as far as Central Asia.

[11] From the ninth century Christians of Tikrit began to migrate northwards due to restrictive measures taken by some Muslim governors.

[12] The Christian community received a setback when the governor ordered the destruction of the main cathedral known popularly as the "Green Church" in 1089.

[12] Regardless, the city remained an important center of the Syriac Orthodox Church until its destruction by Timur in the late 14th century.

During the Ottoman period Tikrit existed as a small settlement that belonged to the Rakka Eyalet; its population never exceeded 4,000–5,000.

[11] In September 1917, British forces captured the city during a major advance against the Ottoman Empire during World War I.

On April 13, 2003, several thousand U.S. Marines and other coalition members aboard 300 armored vehicles converged on the town, meeting little or no resistance.

During his final period in hiding, he lived in a small hole just outside the town of ad-Dawr, 15 kilometres (9 mi) south of Tikrit on the eastern bank of the Tigris, a few kilometers southeast of his hometown of Al-Awja (although the story of having been found in a hole specifically has come into question as being a piece of war-time propaganda).

On November 22, 2005, HHC 42nd Infantry Division New York Army National Guard, handed over control of Saddam Hussein's primary palace complex in Tikrit to the governor of Saladin Province, who represented the Iraqi government, discontinuing the existence of what once was FOB Danger.

The U.S. military subsequently moved their operations to al Sahra Airfield, later known as Camp Speicher, northwest of Tikrit.

Plans for the palace grounds when originally returned to the Iraqi people included turning it into an exclusive and lush resort.

However, within weeks of turning over the palace, it was ravaged, and its contents, (furniture, columns, even light switches), were stolen and sold on the streets of Tikrit.

The 402nd Civil Affairs Detachment of the U.S. Army, and the government of Salah ad Din province, began plans to improve local economic conditions.

The school will teach local people skills in different fields of technology, which will help to build and improve Iraq's economic stability.

The vocational school's operation, support and funding are modeled after a system South Korea used in another part of Iraq.

[23] The Iraqi government blamed the massacre on both ISIL and members of the Arab Socialist Ba'ath Party – Iraq Region.

In March 2015, the Iraqi Army along with the Hashd Shaabi popular forces launched an operation to retake Tikrit.