input: The earliest Spanish explorers in the 16th century did not find the Plains Indians especially warlike. The Wichita in Kansas and Oklahoma lived in dispersed settlements with no defensive works. The Spanish initially had friendly contacts with the Apache (Querechos) in the Texas Panhandle.  Three factors led to a growing importance of warfare in Plains Indian culture. First, was the Spanish colonization of New Mexico which stimulated raids and counter-raids by Spaniards and Indians for goods and slaves. Second, was the contact of the Indians with French fur traders which increased rivalry among Indian tribes to control trade and trade routes. Third, was the acquisition of the horse and the greater mobility it afforded the Plains Indians. What evolved among the Plains Indians from the 17th to the late 19th century was warfare as both a means of livelihood and a sport.  The Plains Indians raided each other, the Spanish colonies, and, increasingly, the encroaching frontier of the Anglos for horses, and other property. They acquired guns and other European goods primarily by trade. Their principal trading products were buffalo hides and beaver pelts.  Although they could be tenacious in defense, Plains Indians warriors took the offensive mostly for material gain and individual prestige. The highest military honors were for "counting coup"--touching a live enemy. Battles between Indians often consisted of opposing warriors demonstrating their bravery rather than attempting to achieve concrete military objectives. The emphasis was on ambush and hit and run actions rather than closing with an enemy. Success was often counted by the number of horses or property obtained in the raid. Casualties were usually light. "Indians consider it foolhardiness to make an attack where it is certain some of them will be killed."  Due to their mobility, endurance, horsemanship, and knowledge of the vast plains that were their domain, the Plains Indians were often victors in their battles against the U.S. army in the American era from 1803 to about 1890. However, although Indians won many battles, they could not undertake lengthy campaigns. Indian armies could only be assembled for brief periods of time as warriors also had to hunt for food for their families. The exception to that was raids into Mexico by the Comanche and their allies in which the raiders often subsisted for months off the riches of Mexican haciendas and settlements. The basic weapon of the Indian warrior was the short, stout bow, designed for use on horseback and deadly, but only at short range. Guns were usually in short supply and ammunition scarce for Native warriors.

Answer this question "what was the second factor?"
output: Second, was the contact of the Indians with French fur traders which increased rivalry among Indian tribes to control trade and trade routes.

Question: Orchestral Manoeuvres in the Dark (OMD) are an English electronic music band formed in Wirral, Merseyside in 1978. Spawned by earlier group The Id, the outfit is composed of co-founders Andy McCluskey (vocals, bass guitar) and Paul Humphreys (keyboards, vocals), along with Martin Cooper (various instruments) and Stuart Kershaw (drums); McCluskey is the only constant member. OMD released their debut single, "Electricity", in 1979, and gained popularity throughout Europe with the 1980 anti-war song "Enola Gay".

Founders Andy McCluskey and Paul Humphreys met at primary school in Meols in the early 1960s, and in the mid-1970s, as teenagers, they were involved in different local groups but shared a distaste for guitar driven rock with a macho attitude popular among their friends at the time.  By 1975 McCluskey had formed Equinox, as bassist and vocalist, alongside schoolmate Malcolm Holmes on drums, while Humphreys was their roadie. During that time McCluskey and Humphreys discovered their electronic style influenced by Kraftwerk. After Equinox, McCluskey joined Pegasus, and, later, the short-lived Hitlerz Underpantz, alongside Humphreys. McCluskey would usually sing and play bass guitar; roadie and electronics enthusiast Humphreys graduated to keyboards. The pair shared a love of electronic music, particularly Brian Eno and Kraftwerk.  In September 1977, McCluskey and Humphreys put together the seven-piece (three singers, two guitarists, bassist, drummer, and keyboard player) Wirral group The Id, whose line-up included drummer Malcolm Holmes and McCluskey's girlfriend Julia Kneale on vocals. The group began to gig regularly in the Merseyside area, performing original material (largely written by McCluskey and Humphreys). They had quite a following on the scene, and one of their tracks ("Julia's Song") was included on a compilation record of local bands called Street to Street. Meanwhile, Humphreys and McCluskey collaborated on a side-project called VCL XI (named after a misreading of a valve from the diagram on the back cover of Kraftwerk's Radio-Activity album; the name of valve is actually written with Arabic numbers, VCL 11, and not Roman numerals). This side-project allowed them to pursue their more bizarre electronic experiments, often working with tape collages, home-made kit-built synthesisers, and circuit-bent radios.  In August 1978, The Id split due to musical differences. The same month, McCluskey joined Wirral electronic outfit Dalek I Love You as their lead singer, but quit in September.

Using a quote from the above article, answer the following question: Any other collaborative project?
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Answer:
In August 1978, The Id split due to musical differences.