The reason for it is because people were fighting for our land, either defending it or extending it, because that was the main source.
1	The	the	DET	DT	Definite=Def|PronType=Art	2	det	2:det	Discourse=adversative-antithesis:15->21:1|Entity=(23-abstract-new-cf4-2-sgl
2	reason	reason	NOUN	NN	Number=Sing	9	nsubj:outer	9:nsubj:outer	Entity=23)
3	for	for	ADP	IN	_	4	case	4:case	_
4	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nmod	2:nmod:for	Entity=(21-abstract-giv:act-cf2*-1-coref)
5	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	9	cop	9:cop	_
6	because	because	SCONJ	IN	_	9	mark	9:mark	_
7	people	person	NOUN	NNS	Number=Plur	9	nsubj	9:nsubj	Entity=(24-person-new-cf5-1-sgl)
8	were	be	AUX	VBD	Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin	9	aux	9:aux	_
9	fighting	fight	VERB	VBG	Tense=Pres|VerbForm=Part	0	root	0:root	_
10	for	for	ADP	IN	_	12	case	12:case	_
11	our	our	PRON	PRP$	Case=Gen|Number=Plur|Person=1|Poss=Yes|PronType=Prs	12	nmod:poss	12:nmod:poss	Entity=(20-place-giv:inact-cf1-2-coref(17-person-giv:inact-cf3-1-ana)
12	land	land	NOUN	NN	Number=Sing	9	obl	9:obl:for	Entity=20)|SpaceAfter=No
13	,	,	PUNCT	,	_	15	punct	15:punct	_
14	either	either	CCONJ	CC	_	15	cc:preconj	15:cc:preconj	Discourse=elaboration-additional:16->15:0
15	defending	defend	VERB	VBG	VerbForm=Ger	9	advcl	9:advcl	_
16	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	15	obj	15:obj	Entity=(20-place-giv:act-cf1-1-ana)
17	or	or	CCONJ	CC	_	18	cc	18:cc	Discourse=joint-disjunction_m:17->16:0
18	extending	extend	VERB	VBG	VerbForm=Ger	15	conj	9:advcl|15:conj:or	_
19	it	it	PRON	PRP	Case=Acc|Gender=Neut|Number=Sing|Person=3|PronType=Prs	18	obj	18:obj	Entity=(20-place-giv:act-cf1-1-ana)|SpaceAfter=No
20	,	,	PUNCT	,	_	26	punct	26:punct	_
21	because	because	SCONJ	IN	_	26	mark	26:mark	Discourse=explanation-justify:18->15:1
22	that	that	PRON	DT	Number=Sing|PronType=Dem	26	nsubj	26:nsubj	Entity=(20-place-giv:act-cf1-1-ana)
23	was	be	AUX	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	26	cop	26:cop	_
24	the	the	DET	DT	Definite=Def|PronType=Art	26	det	26:det	Entity=(20-place-giv:act-cf1-3-coref
25	main	main	ADJ	JJ	Degree=Pos	26	amod	26:amod	_
26	source	source	NOUN	NN	Number=Sing	18	advcl	18:advcl:because	Entity=20)|SpaceAfter=No
27	.	.	PUNCT	.	_	9	punct	9:punct	_
