Problem: Mayday Parade is an American rock band from Tallahassee, Florida. Their debut EP Tales Told by Dead Friends was released in 2006, and sold over 50,000 copies without any label support. In July 2007, Mayday Parade released their debut album A Lesson in Romantics.

On July 24, 2014, the band announced they will be making a fifth studio album to be released in 2015. A tour during late 2014 also happened, entitled The Honeymoon Tour, with supporting acts Tonight Alive, PVRIS and Major League. According to an issue of Alternative Press, the band is currently recording with Mike Sapone (Brand New, Taking Back Sunday, Sainthood Reps) and was scheduled to be released sometime in the fall of 2015. The band also tweeted "MAYDAY PARADE 5 IS DONE" in late February of that year, indicating that they had finished their 5th studio album. On July 17, 2015, Mayday Parade announced that their new album Black Lines would be released on October 9 through Fearless. At the second annual Alternative Press Music Awards on July 22, it was announced the Alternative Press Tour would be revived, with Mayday Parade headlining and supporting acts Real Friends, This Wild Life, and As It Is.  Mayday Parade were announced as part of the line-up for Slam Dunk Festival on the 10 February 2016, alongside American rock band Yellowcard and more. The official music video for "Let's Be Honest" featured veteran actor and musician Michael Jason Allen as Capt. Giorgio Chavez. Mayday Parade played the 2016 Vans Warped Tour, alongside Yellowcard, We the Kings, New Found Glory and Sum 41.  A 10th anniversary edition of Tales Told by Dead Friends, featuring new packaging and an additional track "The Problem with the Big Picture Is That It's Hard to See", was released in November 2016. Following this, a 10th anniversary edition of A Lesson in Romantics was released in March 2017, featuring demos. Producer Kenneth Mount criticized the band on Twitter for not giving Lancaster credit in commentary, "I'm slightly confused why mayday parades commentary for lesson in romantics never mentions Jason Lancaster at all, voice of 50% of the album...Jason also recorded all his vocals naked for a lesson in romantics, that should totally make the commentary. I've waited ten years for that".

Did they work with any other groups or artists?

Answer with quotes: According to an issue of Alternative Press, the band is currently recording with Mike Sapone (Brand New, Taking Back Sunday, Sainthood Reps)

Question:
The Lenape (English:  or ), also called the Leni Lenape, Lenni Lenape and Delaware people, are an indigenous people of the Northeastern Woodlands, who live in Canada and the United States. Their historical territory included present-day New Jersey and eastern Pennsylvania along the Delaware River watershed, New York City, western Long Island, and the Lower Hudson Valley. Today, Lenape people belong to the Delaware Nation and Delaware Tribe of Indians in Oklahoma, the Stockbridge-Munsee Community in Wisconsin, and the Munsee-Delaware Nation, Moravian of the Thames First Nation, and Delaware of Six Nations in Ontario. The Lenape have a matrilineal clan system and historically were matrilocal.
At the time of sustained European contact in the 16th centuries and 17th centuries, the Lenape were a powerful Native American nation who inhabited a region on the mid-Atlantic coast spanning the latitudes of southern Massachusetts to the southern extent of Delaware in what anthropologists call the Northeastern Woodlands. Although never politically unified, the confederation of the Delaware roughly encompassed the area around and between the Delaware and lower Hudson rivers, and included the western part of Long Island in present-day New York. Some of their place names, such as Manhattan ("the island of many hills"), Raritan, and Tappan were adopted by Dutch and English colonists to identify the Lenape people that lived there. Based on the historical record of the mid-17th century, it has been estimated that most Lenape polities consisted of several hundred people but it is conceivable that some had been considerably larger prior to close contact, given the wars between the Susquehannocks and the Iroquois, both of whom were armed by the Dutch fur traders, while the Lenape were at odds with the Dutch and so lost that particular arms race.  During the Beaver Wars in the first half of the 17th century, European colonists were careful to keep firearms from the coastally located Delaware, while rival Iroquoian peoples such as the Susquehannocks and Confederation of the Iroquois became comparatively well armed. Subsequently, the Lenape became subjugated and made tributary to first the Susquehannocks, then the Iroquois, even needing their rivals' (superiors') agreement to initiate treaties such as land sales. Like most tribes, Lenape communities were weakened by newly introduced diseases originating in Europe, mainly smallpox but also cholera, influenza and dysentery, and recurrent violent racial conflict with Europeans. Iroquoian peoples occasionally fought the Lenape. As the 18th century progressed, many surviving Lenape moved west--into the (relatively empty) upper Ohio River basin.  Smallpox devastated Native American communities even located far from European settlements by the 1640s. The Lenape and Susquehannocks fought a war in the middle of the 17th century that left the Delaware a tributary state even as the Susquehannocks had defeated the Province of Maryland between 1642-50s.
Answer this question using a quote from the text above:

How many people made up this tribe?

Answer:
the Lenape were a powerful Native American nation